I'm using the Hi-Val 16X. I don't remember the exact price, but I think it was under $70 at a local store's retail price, so you could get it much cheaper somewhere else.
It's really fast, and REALLY QUIET. It sounds like a whisper when it starts up.
On the other hand, my Yamaha burner sounds like a rocket about to launch when it starts up LOL. (well, it kinda is)