1 tire size combo to rule them all - what is it?!

bigdog1250

I've been scouring different threads for 3 days now and can't find what I'm looking for so here goes.

I'm in drastic need of new rear tires. Car has 11k on it and the rears are toast, front look great with about 50% life still. Due to current economic factors I'll be replacing just the rears but will get new fronts in another month prior to my next track day.

So, my question is for maximum performance (I don't care about speedo inaccuracy) what tire size combination will yield the best results on the Sport Package wheels?

Here's what I'm considering and debating between:

265 x 285 / 265 x 305 / or 275 x 305

**Let's not turn this into a tire brand discussion, I'm already set on getting RE-11s.**

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350z / 40th 370z / C6 Z06 / BMW M4 / V10 R8 / C7 Grand Spot / 997.1 GT3 / S2K / Camaro ZL1 / 718 GTS / 991.2 GT3