From the rests that you've listed, here is how I personally would rank them... 1 being first choice:
1. Limbdriver Pro
2. TT Smackdown
3. Ripcord Code Red
4. QAD HDX
I prefer limb-driven for the same reasons that Milo mentioned. The Limbdriver is a very simple, yet extremely effective arrow rest. One other thing that separates the LD from the others on your list is the launcher itself... The LD launcher is made of spring steel, whereas the others are rigid plastic. From what I've read, and from what I've seen, IMO the spring steel launcher is a bit more forgiving than the others, which generally results in better accuracy.