"Whip"???
WTF. When did .org become B.E.T.?
Anyway... since the factory wheel is 15". A 13" wheel is about as small as you're going to want to go, and even that may end obscuring your view of the cluster, although just a little, and moving your head a bit is an easy way round that. (I've been dealing with a 13" wheel i got with a parts car for years, and in fully intend to replace it soon) However, i wonder if an additional 1" of clearance is really going to make that big a difference.
If it is, then by all means, find a nice 330mm wheel. Grant makes quite a few, if you're looking for cheap (that's what i have now). Momo has a few models in the 12.5-13" range as well. As stated previously, an Evo wheel is not going to suit your requirements for additional clearance.