How about mismatched wheels? Here's one under compression (T5 at Laguna) from last weekend. Almost looks like there's enough space for one size up in the front.
F: SM-10 black 18x8.5 ET35, 245/40R18 RE71-r, -3 deg camber
R: some forgestar 18x9 ET50ish, 265/35R18 RE71-r, -2.2 deg camber (and a 3mm spacer for the corckscrew)
KW V3, ride height about 1" lower than stock
