Well I too hate the PR angle of the W2 but they would be the best choice, you have to make up for the lost lift with a bigger cam or higher ratio rockers. Guys out there turn 8000 with W style rocker set ups all the time. By the way a higher ratio rocker helps the PR geometry in a SB. Run the biggest bore you can to deshroud the valves, what stroke you run will just be determined by the gear you want to run (shorter stroke=more RPM=lower gear ratio and vise aversa). I would get the heads angle milled to 17*

If you want to run the RHS heads you will make less power, my theory is always build as much HP as you can and then figure out how to use it.