John, you should really contact the guys at discount tire, see what they can do for you. I got my Enkeis from them. Not knocking Rotas, I ran them for a couple years. But if performance is anywhere close to on your mind Rotas arent really the best bet out there. The boosts I ran, granted were wider than stock, but dang near as heavy, couple that with a slightly larger tire, you have now successfully added more weight to the car. Maybe its not that big a deal, but I swear to it that when I switched to the Enkeis all aspects of driving (accelerating, stopping, etc.) got better with the lighter rims. I know that you do your research and know your stuff, just throwing it out there.
"2007 WRX- PPG'd, 20G- Tim Bailey tuned
Stage 2 2005 WRX