I want 17's but am having trouble...
 

I want to put aftermarket 17's on my Z but I am having problems finding the right width/offset/and weight. I would like a 17x9 in the front and 17x10 in the back. I have no idea what offset I would need for this combo. Also, I would like a fairly lightweight wheel. What size tires would be best on the 17x9 and 17x10 combo? If anyone has pictures of aftermarket 17's on the Z please pass them along my way or post them. Also, please direct me towards any websites that might sell the types of rim I am looking for. Thanks in advance.

SSR Comp H from tirerack.com are close at 17x8.5 front and 17x9.5 rear. They're not listed on the site but they do sell them, you'll have to call. You can see a pic of the wheels on the car by navigating the website (it'll show the 18's, close enough to get an idea).