Like the others said, the weight and bulk of your other gear will decide the issue.

If you're looking at 25 - 30 pound loads, with some light gear (solo tent or tarp, canister stove and one pot, etc.) you might want to look at the Osprey Exos series packs - 46 might work, 58 almost certainly would. Both packs are on sale at Backcountry Gear right now (use the Portal in the tool bar above), for $146 and $175 - not a lot more than the pack you found, and top notch gear instead of (as someone else said) a pack that's mostly going to be carry-on luggage, with a little light hiking somewhere along the line.