Osprey Atmos as a packrafting pack?

I’m looking for a lightweight, but not superweight pack for 3-5 day rafting/hiking trips in Warm climates.

Just wanted to get some oppinions of the Osprex Atmos 50 or 65 as a packrafting pack http://www.ospreypacks.com/Packs/AtmosSeriesMens

I understand some traditionalists frown opon the air suspension system, but from the reviews I read it is seems to be effective as long as you don’t overload it. I was thinking the air suspension system would be a good feature for a packraft pack by not absorbing water and helping the pack to dry/keeping it off your back after rafting. The Harness also appears to be (closed cell foam?) and is perforated, so I expect would expect it to dry quickly.

I’ve had a look at the exos series 58 (1.14kg), which is significantly lighter than the Atmos 65 (1.68kg), but it is a little to minimalist on the padding for my liking. I deally if their was a model between the Exos and then Atmos in terms of weight I would propbably consider that.