What's the ideal wheel and tire size on a G35 coupe for weekend road racing that wouldn't be too drastic for daily driving?
Also, any wheel recommendations that wouldn't scream "look at me" too much?

What wheel to install on your G35 should be your taste not ours. Attend a few meets, find something you really like then you'll have your answer. You could also check our Gallery and Garages, but that's not like seeing it in person. You'll see many opinions posted here but that's all they are, someone elses opinion not yours....
Gary

OEM Rays might suit your taste.

Any set of works looks good, but like Gary said, its personal taste.

For track use, think low unsprung weight, so a lightweight set of 18's is a good bet, like BBS, Rays, etc. There are some Enkeis that are pretty light as well.

Thanks G35fromPA, thats the kind of answer I was wanting. I already understand the "personal taste" aspect of buying wheels and I must have looked at hundreds already. I think I'm looking for a wheel that looks like a racing wheel, not just shiny and pretty.

19 inch volk gtc is my first choice , gtc is close second

I like the looks of these and they are not super expensive but it looks like they don't come in 19".
http://www.wheelsnext.com/wheels-rim...persilver.html