I thought I was committed on the rims to 17" but it turns out I have some wiggle room. So now I am between 15 and 18". This is the look I am going for as far as color scheme. The tires on this are 275 35 18 front and 335 30 18 in the rear. That looks good to me and that is where it becomes a question to me.
Also I believe you can get more tire on the ground which if the tires are equal can't be a bad thing.