“my gear is fairly light”

How light, and how small? That sets the bar for what backpack to get.

This is just my opinion; after looking at the REI specs ( http://www.rei.com/product/747085 ), how about something slightly bigger, much lower weight, and lower cost?

http://www.gossamergear.com/cgi-bin/gossamergear/Miniposa.html It even comes with the Sitlight pad.

-Barry