I was curious if the comment about Hyper G not pocketing for you had more to do with the PD than the string, as PDs and APDs, in my experience, just don't pocket like the sticks I prefer and rather shoot off the bed, adding to that direct power you get. I say that only because Hyper G pockets fantastically for me, but then again I'm generally hitting nothing but soft frames so maybe it's the reverse and I'm getting pocketing from the sticks rather than the Hyper, or some combo of both. Just a thought. Really seems like s7t is the string for you, though. Don't force Hyper if you end up just not feeling it.
Speaking of the G, I've always gone with 16L or 17 depending on the stick, but the shop I bought the Iga from (strung with G 16L) tossed in an extra set of Hyper G 16 in the racquet box they sent me even though I didn't pay for an extra set and double checked the receipt. Best guess is that they did so because the racquet box the frame came in had a rip in it, so perhaps they figured since the frame was just being sent locally (same city) through the courier they would just send the bad box (frame wasn't at all damaged) but toss in an extra set. Anyway, I don't think I've ever tried the 16g before. But seeing
@haqq777's comment above makes me think I'll like it just fine. And let's face it, I wonder if I would actually be able to really tell any difference between 16 and 16L if I wasn't already beforehand that there was a difference.