You may want to consider the 15 x 6.5 BBS wheels which you can get for the $150/set price range you want to spend. They only weigh 11lbs each, but I do realize they are not 7" wide. I still run a 225/50/15 on them with no problems. What do I lose in contact patch vs. a 7" wheel? I don't know - would be a good experiment but I don't have any 7" wheels.

http://itforum.improvedtouring.com/forums/...showtopic=11417

Ebay will be your best bet if you decide you want them.