I would go Hield or Dunn - probably Hield because of his size and outright shooting/scoring ability - two things we really need at the SG spot moreso than we need Dunn's passing and ball handling talents.
But I'd be absolutely thrilled with either.
Dunn has excellent size and strength for a PG (6'4", 6'9" wingspan, 205 lbs) to go with impressive athleticism and good ball handling skills. He should have no problem getting his shot off against NBA Point Guards, as he should have a matchup advantage 80% - 90% of the time. He also has the physical tools to be a good defender in the NBA.
Hield also has good size and strength (6'5", 6'9" wingspan, 212 lbs) and quickness for the SG spot - combine that with the ridiculous (Steph Curry like) range on his jump shot and his uncanny ability to hit shots with a hand in his face, and I think he'll have no trouble getting shots off against NBA defence either. He also has the physical tools to be a good defender in the NBA.
With Murray however, he doesn't have the ball handling or passing skills to be a full time Point Guard. That pretty much forces him to the SG spot, where his combined lack of size (6'4", 6'6" wingspan), athleticism and ball handling skills pose a real concern at the NBA level.
Will Murray be able to create the space he needs to get shots off at the NBA level, or is he going to be completely dependent on having to run off screens, and shoot off the catch? If teams attack him hard at the perimeter, does he have the quickness and ball handling ability to capitalise on that and get to the basket? If he gets to the basket, will he be able to finish against NBA length?
If worst comes to worst and Murray's struggles to get his shots off, is he capable of contributing in other ways? He's a poor defensive player, he's not a great playmaker either. That means if he can't find a way to get his shots off consistently, he's probably going to be a complete non factor.
Dunn on the other hand is an excellent rebounder, playmaker and defender so he can contribute in other ways if his scoring doesn't translate. Hield also is a good rebounder and has the physical tools to become a good defender. That gives both of those guys a pretty low chance of busting IMHO, because they can contribute in a variety of ways.
I look at Murray and I see Jimmer Fredette (worst case) and JJ Reddick (best case). If he gets drafted anywhere higher than #5 I think he's going to struggle to justify that with his play. HE is very young though, so the potential is there for him to improve significantly as a ball handler and playmaker - it's a significant gamble though.
The 3 pick alone doesn't get us Okafor!! Why would Philly trade a 20 yo Center who was productive as a rookie for a draft pick that isn't proven??
Hield and Murray both seem like great players but IT, Smart or Bradley have to go to get him here
Because he put up empty stats on a horrible team and Philly will have a log jam in the front court.
If they are empty stats then why would we want a mediocre player and Philly having a logjam doesn't mean they are going to sell Okafor for $.25 on the dollar or even fair value they will take the highest offer and the 3rd pick alone will not be anywhere close to the highest offer
I suspect you are wrong.
I think that if Philly were capable of getting an offer any higher than #3 they would have traded Okafor at the deadline.
They didn't, because they can't. Okafor was drafted #3, so trading him for a #3 pick is not a crazy proposition. Okafor has the added value of being more proven then a draft pick, but he also has the con of being a center (which the 76ers have a billion of).
It makes absolutely perfect sense for Philly to trade Okafor for the #3 pick so that they can draft a scoring guard like Hield, Dunn or Murray. Dunn in particular would be a perfect fit for them, as he gives them a two-way PG with star potential.
Philly could take Ingram with their pick, Hield with ours, and add that to a front court of Noel / Embiid. That's an amazing package to build around.
Unfortunately for them I wouldn't do it, because I like both Hield and Dunn far more than I like Okafor.