Well, I've decided on the wheels that I want to get. Rota Sub-Zero's 17"x7.5"... they have the size and offset I want at a good price and look good IMO.
The tires I'll probably get are Yokohama AVS ES100's. 235/40's...

Now, are the 235's to big for a 7.5" wheel? I know they're a little small for an 8" wheel. The 235's are about 9.25" wide, so there's a difference of about 1.75" in the tire to wheel width.