GT-Cs with Teins

I have the Tein Flex coilovers with EDFC on the way, and have a friend willing to sell me some GT-Cs for a ridiculously good price...only problem is they are a bit larger then I would like (fronts are 19x8.5 with a +27 offset with rears 19x10.5 with a +24 offset.)...will I have any issues with rubbing? I'm not planning to drop the car much with the coilovers, and am not sure what size tires I'm going with (so3s)...any help(tire sizing included) would be apreciated

Also...I'm not too worried about the performance loss as I will have some forced induction on the way, but still a little worried...how bad will it be?