You should go with 17" Slipstreams...that is if they make them in 17", I can't remember off the top of my head if they do or not. I think Rota's 17" rims still only weigh around 16-18lbs. I had 15" gun-metal slipstreams on my last car. Those things were freaking awsome, only 11lbs. You could toss that rim around like it was nothing. Very strong to, I was suprised. Only thing I didn't like about it was the width..only 7" wide. To get a nice big wide contact patch on the ground, I'd go with the 17"...the make the Attacks or Sub-Zero's in 17", I know that for sure. And those look damn good and weigh nothing.