I'm not getting any younger either and in preparation for getting back into bike touring this summer I was looking to replace my Thermarest Ultralight self-inflating pad. It is just too thin for me now. I chose the REI Flash (REI Flash Insulated Air Sleeping Pad - Free Shipping at REI.com). It is thicker, lighter, packs down much smaller, and while not self-inflating is very easy to inflate / deflate. The price was right, too.

I have not yet headed on the road with it, but I have camped out in the back yard 3 nights and slept well, especially the 3rd night. A new tent and pad took some getting used to. Considering it is relatively narrow, I am surprised how well the raised edges do indeed keep me on the pad.

Good luck!