Played 3 hours of doubles tonight. Right before I hit the court, it started raining. So instead of gut/poly, I had to pull out my Exo Tour 16x18 strung with Rip 17 at 40lbs. Wow! What pocketing, spin and comfort with control.
An hour later rain went away. So I hit with Tonic 16/PTP 17 at 50/45. Very good spin and pop. Then I tried to MG Rad Pro Tonic 15L/PTP 17 at 55/47. Massive spin and power.
Then another hour later, started drizzling again so went back to Exo Tour with Rip 17. Maybe it's the cold weather but I can swing away with this setup with plenty of spin, control, power and comfort. Played my best, most consistent tennis with this setup.
I can't speak for people above 4.5. But for me Rip 17 gives me pretty much everything I need. Poly, gut/poly, poly/gut, etc. may give me marginally better performance but at least in cold conditions this fall/winter season, I'm going with Rip 17. Not bad for $7.50.
As far as gut/ptp, it's a GREAT gut/poly setup. Control, pop, spin are all there. It's also the most comfortable gut/poly combo I've used.