I have the new APD with a hybrid of RPM Blast 16 at 53# and Head FXP 16 @ 55#. This set-up makes it very comfortable for me but a bit too powerful. I will be looking for a soft poly as a full-bed on my next restring. No arm pains yet and I came from a IG Radical Pro which is very flexible.
Head IG Radical MP - Babolat Aeropro Drive 2013 - Nike CB 4.3