My vote goes with the biscuit as well for a variety of reasons.

1. From a setup standpoint the biscuit is so much easier to use. No linkages or potential effect on the timing of the cam(s).

2. Full containment.

3. Very quiet to draw especially on carbon arrows.

4. Very easy to maintain (biscuit replacement).

5. Relatively inexpensive.

My only real issue with it though is speed reduction and vane "damage". I had the opportunity to play with one of the new biscuits on my bow recently. With a regular prong style rest the bow was shooting 271 fps. With an untrimmed, brown-bristle biscuit the bow shot 267 fps. With some trimming I got that up to 268 fps but after two dozens shots through the rest the vanes started getting wavy. A stiffer vane design is definitely warranted.

Good luck with whatever you choose.