One approach would be to get that smaller pack, and if your gear doesn't fit, eliminate stuff until it does! laugh (Or buy new smaller/lighter gear if necessary.) This shouldn't be any problem if you're willing to make the changes, and you don't carry anything extra like pro photography gear.

Be sure to consider trying packs from small companies like:
Gossamer Gear
ULA
Six Moon Designs
Mountain Laurel Designs (MLD)

I have the older model Gossamer Gear Gorilla. It's a great pack, and I'm very happy with it. It's about the same size as the Talon 44.