Just get JK 18's. You can get a whole set without tires for under $300 if you scour CL.
I run 245/55/18 on mine, speedo's dead on. Thought about stepping up to a different size, but a nice UHP all season just came out not too long ago in that size, which I'm going to try out when these BFG's die.
The Brown Trout[SOLD]
On the hunt for a 5.9 or 4.7 HO Limited...
In the meantime, this is pretty entertaining....