Appropriate Wheel Offset for 18" Wheels?

So just doing a quick search, based off of my measurements, it seems like I should be able to make the Enkei PF01's to fit with an 18 x 9.5" wheel. They come in both a +15mm offset and a +35mm offset. Any of these tires (Hancook R-S3's) will fit on the wheel:

245/40/18
265/35/18
265/40/18
275/35/18
285/35/18

It all depends on how tight I want everything to fit in the wheel wells.

http://www.summitracing.com/search/brand...28%2B4294920230

I just need to find some time to get the front end together. I may have some later tonight. Maybe I'll be able to squeeze some time in during the week after work and school.