Thanks for the updates guys, I actually thought about it and decided to call my local REI, they rent them (treker self inflating model) for $6day and $3 each additional day and do not charge for the pickup or return dates, so I will be going that route.
I had a blue closed cell foam pad, the cheap kind you get from wal-mart for $6. 72x20x0.4" I figured since I can sleep on the rug on a hardwood floor in my livingroom that it would be sufficient. Boy was I wrong. So glad I did a shakedown run.
At least renting I can see if I like the whole self inflating thing before I spend a lot of money on a pad.
It's just over the next hill...