I need to get a new pad if I,m going to continue camping ! I'm loaded with arthriitus and have back abnorallities from 45 years of heavy construction work and at least one one major trauma...many small agrivations.  I hear all this praise of the Big Agnes stuff, but I have not seen any of it. Their web site does not give me much.    I'm 60 miles and a non paid off day frome a Gander Moountain or a Cabela's.     ...plus,I am scrimping on non-eential stuff    I'd really like to hear what you guys know about the varied Therm-a-Rest pads that I  find my Campmor catalogue sells.  What's the difference between a "trek and travel series" and a "fast and light series"...how about the "neoeir mattresses"?   I've got two nickels to rub together right now,...   but by X-mas,,.      well, ...