Alot of the guys going with Year One 17 x 9 snowflakes, Rally II's, or Honeycombs are running 255/45R17 front and 285/40R17 rear with no issues- 275/40R17's F/R are also a popular choice. John Paige (NOT A TA) has run a 315/35R17 on a 17 x 11 TT II, but as he mentions it's a tight fit with the stock width wheeltubs, unloaded trunk, etc.
I personally would just go for the 17 x 9's F/R with a 4 7/8" backspacing (same as the YO 17" wheels)- that way if you lower the car you'll still have sidewall clearance and no rubbing.
Geno