Matt, no mil looking stuff, fair enough. (Although, IMO a tan devil dog wouldn't look out of the ordinary around here)
If you know what you've got will fit in that tiny Mountainsmith (the last one) go for it. I know REI's got em on sale for $20. If you're like me, the bigger the pack you get, the more stuff you'll cram into it. <img src="/images/graemlins/smirk.gif" alt="" />
If not, consider the Mountainsmith Swift. The new version is the II, but Campmor.com has the old model on sale for $25. A great deal IMO.
I personally like two things on a lumbar pack; 1/ External straps for a poncho or rain shell. 2/ Bottle holders big enough for a 32 oz nalgene.\
BTW Is this going to be for city or rural use?