Eddie House has been solid this season. He just hasn't been as good as he was last year and he's getting up in years (32 at end of season, 33 by next year's playoffs). It looks to me that we've seen the best that House has to offer and that decline is setting in ... and thus, that next offseason will be the right time to look for a new primary backup point guard.
For this season, I'm more than happy to have House as the primary backup guard. He's doing a solid job and I expect him to continue doing so.
I love Eddie House, but isn't one of the jobs of the backup PG to become the starting PG in case of injury. That is actually one of the reasons teams have backup PG's--insurance. I've yet to hear anyone say that either Eddie or Marquis could be our starting PG if necessary.
I also am very happy with Marquis, but if we add a true PG as a backup (ala Marbury or Cassell, but hopefully better) and then Eddie gets hot as he did playing next to Marbury, then it will be Marquis' minutes that go down, especially if this happens during the playoffs.
Sadly without Rondo we're not winning a title this year. The Lakers are better than in 07-08, Orlando is better, Cleveland is better, the Hawks are better, etc....
Here is what I said about that in other thread:
(I don't buy into the argument that if Rondo goes down then we're not going anywhere so it doesn't matter anyway. You still have to try to win, odds be [dang]ed.....and furthermore, if we're going to lose (without Rondo), let's not do it via turnover fest, which would be just plain ugly to have to watch......)
Adding to that, it would depend on the timing and duration of the injury. For example, The Celtics might need to win ECF game 7 without Rondo in order to play some team who only got to the finals because Kobe was injured (Let's say Denver). We'd have a chance against Denver without Rondo as long as we had a player who could consistently get the ball across half court with enough time to run the halfcourt offense. We might very well lose withouth Rondo, but let's not lose ugly.
I'm still open, however, to someone telling me that Marquis or Eddie (or Paul or Ray) can bring the ball over half court consistently in an intense playoff series. If someone tells me yes, then I'll let my PG obsession go. But the answer is probably no, which is why I'm going to guarantee the Celtics add a pure PG before the playoffs role around. Then, my argument becomes might as well do it sooner rather than waiting as long as we did with Marbury and Cassell.