I intend on being able to rotate them every 3k miles. That's why I'm wanting to stick to the same size all the way around. I ran 275's all the way around on my '98 Cobra and it didn't cause a problem, so I'm hoping it doesn't in this case either.
I am going staggered 9"x18" front with 255-45-18" 10"x18" rear 285-40-18" but I have used up to a 305 on a 9" rim. These are my new rims for my 08 Bullitt.