I've used a few and prefer the Bushbuddy for cooking (a clone if a copy, actually). It's a gasifier stove. I also have an Emberlit clone and it's more of a "contained camp fire".
Some people mentioned the MSR Dragonfly. I had one and hated it. It's like having a Harrier jet hovering close by. It's heavy, packs awkwardly, the pump is unreliable and the pot stand is slippery. The pumps is also a pain to connect, especially in the cold.