For the price, a walmart blue pad cannot be beat. I used my wife's purple yoga style(same as the blue)pad last year and a WM 50*sleeping bag down into the 20's. As far as comfort, well, I'm going to make an TQ/UQ for winter. For Spring or Fall, Summer temps for you, I just use a sleeping bag for the full coverage, no need for a pad.
Sorry, no advise for cheap-in-price UQ, I'm a DIY kind of guy.