Mine is a Clark Ultralight. www.junglehammock.com
They are pricey, but pretty much the best you can get (and made in the US). A less expensive alternative are the ENOs - http://eaglesnestoutfittersinc.com/
There are other brands, but those are the only two I have firsthand experience with.

A pad is only needed in a hammock for insulation, not for cushioning like on the ground. For my comfort level, if it's above 50 at night I don't use one. Under 50 and I use one of the cheap blue foam pads.