For most peeps (what do I know ), a good quality pack means serious consideration and associated outlay of dosh. Yet well worth the investment in both (me finx).
As an aside, does that Exped have any additional outer 'room' options, similar to the OMM 'Multi-Sports-Compressor' (marketing bollox or what?) thing?
The OMM chest pouch option will fit most packs, I'd recommend one if you ever have the need to augment capacity/balance (all-be-it only 4 litres). I bought my chest pouch in the hope that it would have room enough for my DSLR (I was wrong), but it's great as an easily accessible stash space for maps, gloves, on-the-go munchies etc...
… I now carry a compact Panasonic camera in one of the waist belt pockets.