Well, for those of you looking for a 15" replacement, here are the Enkei Performance EDR9 in 15" silver paint, wearing Michelin Primacy MXV4's. The look is more finished than the stock 15" rims with no wheel covers (what we old guys called "hub caps.") I was worried that the 15" rims wouldn't translate from the 17" size, but it is very clean and doesn't look clunky, I think. I have the Prius Plus rear sway bar installed, and I am waiting for the Tanabe front strut tower brace from Juiced. I also have a K&N air filter replacement. Well, the handling is very crisp, and much more solid with a rear sway bar and grippier tires. It really does need the front strut tower brace since I can feel the steering geometry changing as I make turns at speed (lane changes and off-ramps.) Mileage is down, probably about 5% at this point with 38/36 psi, but it is a much funner car IMHO. I am probably driving it a little more like a "normal" car and not nursing it as much. I hope this helps others looking to do a 15" replacement.