Re: Good advice for bad backs
Both the X-ray and Marauder are basically going to be lumbar packs for you, the Zulu (G2 only-the G1 will be too short for you) would work a bit better, but I'd say go with a Navigator. Although way underrated, it is one of the best all-around packs in the Kifaru lineup.
The stays are taller which should get you some shoulder lift. I know the specs make it seem larger than what you may think you need, but it is a very trim pack for its capacity and compresses down extremely well. I use it quite often as EDC, with no problems. I am often away from home for a few days at a time, so I like the extra capacity, but even with smaller loads it works quite well and you don't feel like you're diggin through a big trash bag. You'll have the ability to expand that greatly if needed, extraordinary organizatiol capability, and the Wraptech suspension will easliy handle heavier loads (80+lbs with no problem). You could even upgrade it to the Wraptech Plus with a Duplex belt.
If you don't want the PALS or 1000D, then look at the hunting line equivalent Siwash.
"Pleasure ?" I said. "I don't understand the question."
I didn't do it for pleasure. I did it for pain.