NXT tour s is a nice ball, I too lost a little distance with the S, I didn't mind though they feel pretty nice offf the club. I only buy higher priced balls when I run out of Gamers, the Topflite Gamer is so close to all of the $30/dozen balls that I am very happy with that. I have also recently played the Qstar,, E6 and both the NXT tour and tour-s. I bought someMax Fli Urethane u3s, (Rocks IMO), and was given a dozen HEX Chromes in a tourney I played in. I would gladly play any of the above mentioned balls they are all that close. The exception are the Max FLIs, Don't like them.
For me the deciding factor here is price, the gamers are $15/Dozen and I think if the graphics were blacked out that most high to mid cappers couldn't tell the difference between all of the above balls until you hit your approach, I think the Chrome and the Tour s might check up a bit better.
I ordered some balls from MG golf.com. They claim that these balls perform very close to the Prov-1 and they have test results to prove it on their web site, so at $20/Dozen I though I would give them a try. I'll post my impressions.