Mike,
I'm going to assume (usually a bad idea) that you want to stay within that $80 - $150 range for a rest. I have a Caldwell Lead Sled that works just fine for zeroing and cleaning weapons. It is not something I'd ever use to shoot for a paper shootin high score. I believe there also have been a few more modifications made lately on the Lead Sled where you have added adjustability available, but don't know offhand what the price is. Hope thaty helps.