In reply to goosebump: I had an AK47 before I got my Arc'teryx pack, then the macpac pursuit 50.
I was rid of the AK47 within a year because the lid was absolutley awfull, and I mean useless!
I would have kept it if I'd had the floating lid version, although it wasn't available at the time. If your planning to load the thing with rope,rack and other gear,and your just slightly over the 47ltrs available the lid becomes a pain in the neck as its sooo small.
The pockets on the lid are tediously tiny too.
Don't buy the crux unless you get the floating lid version.