Spoke to Billy at Tires23 and he didn't advise spacers that wide. I'm a little confused about this issue though. If i'm looking for rims in 17x7, I guess I should look for an offset of about +20, right?
This all changes if I get 17x7.5 or 17x8 right? Does anyone know what the offset is on the existing 19 inch iforged wheels? Is there an offset and tire size calculator that will help me determine what offsets would work for sizes other than 17x7?

 

I run 17x7+45 oem sedan wheels on my coupe. It works fine, but looks somewhat goofy being so sunken in, its only the winter so it doesn't really matter to me

 

Yeah, it's the sunken in thing i'm trying to avoid, so i'm trying to move up to 17 x7.5 or 17x8" ideally with lower positive offsets.
I found a great offset calculator here: http://marksink.com/tire_wheel_offset/offset.html

Unfortunately, there are few companies that make a wide range of decent looking rims in sizes that would fit my car. Can anyone suggest any rims they're using (other than BSA 264/329 and OEM rims) for their 17 inch winter setup? I'm willing to pay a bit, but I do want it to look good...even for winter.
Thanks all,
S.

 

Find a set of OEM coupe 17's or 350z 17's which fit well. If you want a good looking set of 17's for winter, I would go with 17x8 5zigen fn01rc's