Since someone brought this zombie thread back from the dead, let me reply to the original question by saying that I have a P2 that I still use; don't have a ton of miles on it, less than a thousand, and it's holding up great. Rather than thinking of some other brand of pack, why not get another ULA? Circuit, or if you think you might want extra (excess?) capacity, a Catalyst. My Circuit does pretty much everything for me for three-season backpacking.

Wandering Daisy commented that the three important things about packs are "fit, fit, fit". For me, the three things are "Comfort, features, and weight" (with 'fit' being part of 'comfort'). I might toss durability in there too, but only for those contemplating a lot of miles with a really ultralight pack.

For me, and clearly for many others, ULA hits a sweet spot in between the really really light packs and heavier packs with more (often too many) features.