The one pack I will always recomend is the Golite Jam. I love almost everything about it.
I have used it for many long distance trips without resupply, with weights up to 40lbs (loaded with food/water/sierra gear for 10 days without resupply)
the side fins handle the load well, and with my ridgerest rolled up inside, it creastes a virtual frame...
I will never go back to a framed pack for anything but the highest weights, which I usually dont encounter unless I was planning a 7 summit type mountain climb.
I am planing a 10 day/270 mile CDT segment for this summer, again without resupply, so I am looking at a 35lb starting weight (not including water) and of course I am taking my jam pack.
my dad is looking to replace his GG mariposia pack(used for all the same trips my Jam has endured) with the ULA conduit. This pack is comprable to the jam in material, weight, and size. so I beleive it will perform similarly.
my recomendations for 3 season... Golite jam, ULA-conduit.
4 season... Golite gust, Pinnacle.
SUL trips, MLD zip/prophet, GG wisper
FRAMED PACK... take a look at six moon designs