One thing I would definitely change on your setup is the bow quiver. You can get a better quiver that keeps the arrows closer to the bow for much reduced torque. You could also take the wood side plates off your Pearson, and cover the riser with fleece or moleskin and see if that doesn't improve your possible torque issues. I personally would not expect great accuracy with the Whisker Biscuit shooting fingers, but I guess it can be done. I know that guys do quite well with them shooting with a release aid.

The Darton Tundra Extreme is 40.5 Axle to Axle with a 7.5" brace height. It is rated @ 311 IBO, so it is very fast for such forgiving specs. My old damaged shoulders are pulling #61 and the bow is putting out 65 lb./ft. of kinetic energy (29.5" draw).

Darton Archery

The Reflex model that Straightarrow is referring to is the Reflex Caribou. I think it is about 42 or 44" ATA and has a brace of 9" or so. It is not a fast bow, but should be forgiving.