15" wheels for Coupe GT

[Dwight Varnes <mxbreed@lancnews.infi.net>]

Well, now that I've succeeded in completely removing all visible tread 
from my 14" Yoko's, I'm contemplating upgrading to a 15" wheel on my 86 
Coupe. As this is kind of a unique bolt pattern, I'm wondering what might 
work. I'd love to use the Fuchs wheels from a 200Q(?) but imagine it's 
too costly/impossible to change to that pattern.
To finance this upgrade, I *may* sell my 14x6 Revolutions, if anyone is 
interested.
Any real problem with ride quality going plus one? I live in Pennsylvania 
where the roads are like a third world country. TIA