Thanks Waizzz. I was nervous to go any bigger and I wanted to be able to put my summer tires back on when it warms up a bit, hence the 18s. I actually opted for a set of black Work lugs instead of the center caps, so I didn't even buy any. I'll be keeping an eye out for a set. I saw some black center caps with a silver "Z" on them that were appealing. We'll see.

I'll get some more pics posted after I clean them up.

Wheels - Work 11R in Matte Black
Fronts 18x8.5 +38
Rears 18x9.5 +30

Bridgestone Potenzas RE970AS Pole Position
Fronts - 225x50xr18
Rears - 245x45xr18

I like the wheels but those specs and tire sizes are very weak on a 370z.
Did you buy them used? New?

well he is using them as winter set so i suppose that's okay. my G's usually running 245/275 19x9/19x10 in the summer but in the winter run 225/245 8x18 factory wheels.

@Juruki
Thanks! I bought the wheels new for less than 1800. The tires where also new and on sale. I snagged them for around 700. They're both are in line with what came on the car. The sales guy definitely questioned my choice in sizes, but I was trying to save a bit of dough. After all, I just bought the Z outright and dropping 3k on wheels and tire was painful enough. I'm not really sure how aggressive I would want to go anyway. For me there is a thin line between "clean" and "gaudy". I'm new to all of this and didn't want to do something I'd regret like having tire rub, etc. Any direction towards a recommended setup would be awesome.

@Kenchan
I've heard that the G's and Z are nearly interchangeable from many perspectives. Is this setup something you would recommend? Did you have to buy anything other than wheels and tires to pull it off? (i.e. spaces, etc). Thanks for the help!