High on the Mountain Top
Join Date: Jan 2007
Location: New Westminster, BC, Canada.
If it were me, I would be looking for something under 2 kg for that range. I have an Osprey Exposure 50 that I love but it is discontinued. I've also had a Gregory Z-Pack in a similar class, but it too is discontinued. The Arcteryx Bora 50 didn't fit me well, and neither did the MEC Alpinelite.
But really it's all about personal fit, so you need to try out some packs...