I haven't tried SPPP, but I've heard nothing but good things about it. In regards to arm friendly I'd suggest giving the Pro Supex line a try. All of their polys play very soft. I've been using Big Ace for several months now and have been very pleased. With the softer polys I've found that you can string them at your normal tension with no problem. The stiffer ones however prolly need to be dropped a few lbs however. You might want to give Blue Gear a look. It's the same as Big Ace, but textured for better ball bite.
Pure Drive Roddick 2012 - Big Hitter Blue 17g - 54 mains/52 crosses