I'm in the process of fitting 17x9's with an offset of +22 to my gts-t and yeah as someone said.. burning a hole in my pocket.. but i love the rims
I'll be getting camber kits to help out a bit and flaring the guards, we'll see how it goes then. Haven't seen the rear on but the fronts stick out like nothing else.
But I say, the main problem is just the fronts and you have wider guards for them.. so just do it! Maybe look at flaring the rear even if you don't need it so it doesn't look so odd with fat front guards!
but yeah i say DO IT!