But IP, what are you asking Rondo to do? You have Rondo as possibly the most important player on your team, and his effect on the game is comparable to Ford's. That can't be a good thing for Phoenix, considering the importance of both players to their team.
Also, if you're putting Oberto on Duncan, let's just say that Seattle is okay with that matchup. Because if Oberto is in the game and on Duncan, then Biedrins is out of the game, making the other two Kenyon Martin and Al Jefferson.
Big Al scored 26, 20, and 20 points in 3 games against Kenyon Martin and Denver this year. With Oberto on Duncan, that leaves Al Jefferson against Kenyon Martin. Is that 22 point average enough to beat Seattle in a seven game series, considering Rondo and Ford are equally matched?
Now keep in mind, is that production from Rondo and Jefferson enough to win if the other matchups are Duncan on Oberto, Gordon on Roger Mason, and Thaddeus Young on Josh Howard??
I don't think so.
Al Jefferson outclasses Kenyon Martin pretty handily. Josh Howard also outclasses Thad Young pretty handily.
Ford outscores Rondo, but Rondo outplays him everywhere else on the court. Ben Gordon, whatver he does scoring wise, won't change what Roger Mason Jr puts out.
Tim Duncan is slipping, Hoyo. He couldn't make it out of the first round last year, and he won't make it out this year against the fake Suns.
I gave you Jefferson's numbers. You love numbers, IP 
He averaged 22 PPG against Denver. Is that enough to win this series? Nope.
Tim Duncan is not slipping yet. You want him to be, you desperately need him to be to win this. But he's not slipping enough. He's still averaged 19.3 PPG and 10.7 RPG in 2009. He's a 20/10 guy, and he will be again.
I love too how Howard outclasses Thaddeus Young pretty handily. Really?
Last season, Howard had 10 points against Philly in both meetings. Thaddeus Young had 11 and 8 in those same meetings. Problem is, Young's getting better. His most recent game was the 11, and with another year under his belt, making him still 21 years old and at the end of his 4th year, Young has Howard very much under control. You know what you get with 29 year old Josh Howard, and 21 year old Thaddeus Young is still very much improving. He's already with Howard, and after one more year? Howard certainly doesn't outclass Young handily. It's a generous draw, only because I can't predict just how much Young will improve, but should his current improvement rate stay steady, that's a Seattle advantage. Certainly not "outclassed pretty handily."
Ford negates a Rondo advantage. That duel is a wash. Those three matchups discussed above (Big Al-Martin, Howard-Young, and Rondo-Ford) should have been your advantages, but they either aren't (Rondo and Howard) or aren't sizeable enough to get you the win (Jefferson-Martin). That leaves us with Oberto-Duncan and Mason-Gordon. Let's just say I'm feeling pretty good if it comes down to Tim Duncan and Ben Gordon vs. Fabricio Oberto and Roger Mason Jr. with a second round berth on the line.
Well, that all depends. If Thad Young can get better, why can't Rondo, Jefferson and like the rest of my bench?
If Playoff experience matters, then why doesn't Rondo, Howard, Oberto, and Bowen give me an advantage?
If Al Jefferson's 20ppg against Kenyon Martin isn't enough to put me over the top, how does it compare to the 7ppg Kenyon Martin averaged in those same contests? I will take 20 over 7 any day.
And I keep getting the feeling that you percieve Oberto as some kind of speedbump at the very least. Lets look at Oberto/Duncan.
Oberto has played for 4 years in teh NBA, and all 4 were spend with San Antonio. He started out as Duncan's backup, but his defensive acumen and nose for crafty scoring and rebounding got him the starting job.
Now against a lot of other guys in the league you might say "Well, Oberto is good defender, but he's no big deal"...but against Tim Duncan that's a different story. He practiced with him, would've been the major guy Tim went against. He knows Tim's moved inside and out, and he's old enough and smart enough to cheat on Tim Duncan (I mean as in positionally and how he defends the shot, I don't mean he's going to punch him or something...but he might).
Also Oberto has been resting all season. Tim Duncan can been carrying a weak frontcourt on his back the whole season for Seattle.
So my question is who has the advantage? An improved Al Jefferson with his 20+ppg and Fabricio Oberto's 5ppg or Tim Duncan with his 20ppg and Kenyon Martin's 7ppg?
I'd say its either advantage Phoenix or a wash.
Then you have Gordon vs Mason Jr and Young vs Howard.
Well we've both been stupid. Howard didn't get his 10ppg against Young, he got them against Iguadola. Young played the PF in those games this year.
So if I face Iguadola, I am worried, because it seems like he's got Josh Howard's number. But Thad Young? Well we won't know. I will take the 6'7 29 year old two way player in any bet though.
As far as benches go, I think Nate Robinson, Kyle Korver, Bruce Bowen (who I could easily put on Ben Gordon), Andris Biendrins, Jason Smith and Ersan Ilaysova have Brandon Bass Dahntay Jones and J Bayless by a country mile.