That will work fine, but you will be limited to a 225/255 set. Pointless to run 18's at that point when you can get the same out of a 17 for less money and a lighter package.

 

point taken!
then looks like it'll be:

front 17x8.5 +51
rear 17x9.0 +45

with the 225/255 rubber

 

I'm partial to RG-D myself, running 17 x 9 +45 all around with 225/255 tires.

 

That will allow you to go with a little more rubber up front too if you like. Either 235/40 or 245/40.

225/45 as mentioned before will fit nice as well and be the exact same sidewall profile as the rear 255/40.

 

nate those look PERFECT!
any other pictures of your car?
pefectly flush with those fenders, are your fenders rolled/pulled?

looks like i'll be going the 17x9 +45 with the 225/255 set up.
only problem is i really wanted a bronze color as my car is RYP, but i guess gold will have to do