Big difference in sound quality/output?

[acschank 0]

I am curious how much of a difference there is between a 2ft^3 and a 2.5ft^3 box tuned to 32hz for a 12" Q. I've read that bigger is better for ported boxes, but 2ft^3 boxes tuned to 32hz are readily available on e-bay. Would I be giving up a lot of output or response for the convenience of an easily available box, or would this be a good buy?

If it matters the Q will be powered by a 1000 watt MB Quart raa1000, and going in a 93 Saturn coupe.