whats the best combo?
 

i have a 97 mustang gt. I currently have 18x9 saleens all the way around. I have michelin pilot sport 255/40/zr18s on there now. Next spring i want to put a little bigger tire on there. I was thinking of going with the Kumho Ecsta MX's. I heard they were supposed to be pretty reliable. So, what do you think would be the best size to buy? Just to let you know, i have all stock suspension, with no plans of lowering the car at all. I was thinking 265/45/18? (a little wider, a little taller) let me know if anybody has these tires and what size they are using with 18 inch rims...thanks

anything guys?