Take your pick, but go slim in any case!
11mm - or even less. It will be a revelation.
If you want to stick with production stuff, take the slims from OB (the soft ones or the classic ones, depends on your style) or Katana (they do 11,5).
I'm a bit disappointed with Tiger, but am still in love with my Cuetec R360. What a great shaft that's ruined by the Everest tip (put on Ultra Skin M)! I would love to get a skinny there...
Predator must be avoided, that's just crap without feel.
Mezz WX900 has also a lot of good say, but it's 12mm.
Cheers,
M