Thanks for all of the input ladies. Just wanted to update. . . (and for the record in case anyone else has a similar question in the future).

So I'd pretty much decided on the Continental GP 4000's (both because they were recommended here and by racer friend, and were available locally). I figured I'd give the 23's a try and if I didn't like them we'd put them on DH's bike and I could go back and get the 25's instead. However the guys at the LBS talked me into Michelin Krylion Carbons (23). They insisted I'd get more miles out of them and fewer flats while sacrificing maybe 0.5 mph to the Conti's. Not to mention they were half the price of the Conti's. Again, I figured I'd try them and if I didn't like them, give to DH. I put about 60 miles on them over the weekend and so far so good. The 23's feel more responsive, as in one little wiggle of the handle bars results in more directional change. I haven't decided yet if this is good or bad, but its definitely different. They seem to corner well, but the true test of that will be Thursday's hill climb/descent. The rolling resistance seems good, and overall they feel much more durable than the stock Bontragers that came on my Trek. Even 60 miles without a flat so far makes me happy. Although I could not get the dang things on myself, had to have DH finish snapping the tires on for me. Makes me nervous if I get a flat by myself, whether or not I'll be able to get 'em off and back on. Might have DH take them on and off a few times for me to loosen.

Anyways, thanks again!