Another vote for the stick shift! I'm running 4.30's right now, and they're coming out, for a set of 4.56's.

Like IEC said, won't see a whole lotta difference with the 3.73's, so I'd say 3.55 for the daily driver, and he'll still feel it on the ole "azz dyno".
Anyone need a good 4.30? Come to think of it, I have a 4.10 sittin here too.