I've got power slinkys on my SR4 as well. Was somewhat of a necessity seeing as the band I recently joined down-choons to C. Had to make a few set-up adjustments, and was worried the super slinkys would be too floppy and give me a whole bunch o' buzz (my action is set relatively low), so went for the increased tension POWER slinkys and they work ace! I'd highly recommend them, but not sure how they feel when played on a "normally" chooned bass.
That's what I have on my SR4 at the moment, regular tuning. They feel tighter than regular slinkies, but you get used to them pretty quickly. I like them a lot.