I was wondering what size tires i should get if i end up getting 17'' rims.
Also, as for rims, what sizes am i suposed to get? and offset?

sorry but i couldnt find a FAQ on this. They should make one for people like me.

 

You should decide on the wheel first and then choose the tires size from there. The wheels are either going to fit or not fit the S2K. You are not going to be able to pick and choose an offset you want.
After you come up with a wheel option let me know and I can get you in the correct size tires for the car.