Aggressive DD wheel/tire combo?

[Woodga16]

I'll be receiving delivery to my '13 GT mid June. I want to go ahead and buy tires/wheels. I can only afford one set of wheels/tires, and they'll be used for DD and track use. I will be going FI soon after buy so traction is important. What's the widest tire I can fit on the back...what wheel sizes should I go? I love the stance of my fathers grand sport with 325s on the rear, I know I can't fit that wide...just saying. Please include the following:

which brand tire: I used goodyear F1's on my 2001 built SS back in the day and they held good, also heard a lot of people using Nitto now.
Wheel dimenions(front and rear): I was thinking x8.5 up front and x10,10.5,11 on the rear depending on which wheel I like best and what dimensions they offer. As far as wheel choices, do you all recommend I go with a 18'' wheel? 19's and 20s look great, but it appears wheel choices are limiting. Thanks in advance.

[back n a stang]

I don't know man.....Yea 18's are good for size options and better price.If you go forced injection you for sure got tire issues.I have major grip problems and I got some mods but no FI or turbo.You really need some 15's for extra playing around,but if you can only go with one set and you will be FI I would go 18's.I have 19's and love them.I like my tires and setup but I think I will use my OEM set to put something on for playing more aggressive

[lowflyn]

Best all around tires i've ran are my 305/30-18 toyo r888s. Great dry traction and great wet traction. bfg kdw2s were close but got beat by the toyos in dry.

[Woodga16]

can I fit those on a 10'' wide rim?

[lowflyn]

I have them on my 18x10 wheels. Your exact size will be different since you have a s197. Ill go ahead and warn you they aren't cheap

[Napoleon85]

I'm running Nitto NT05 275/45/18 up front and NT05R 305/45/18 in the rear and I've been happy with it. Very grippy and you can get good deals if you shop around.