I've been looking at replacement catback exhausts for the R, but I simply can't justify spending $1300-$1500 on an exhaust. Right now the car sounds good with just the resonator delete and turning off the soundakator, but I'd like to change out the exhaust tips. I've looked and I've not found a decent DIY or suggestion on tips to buy. I'd prefer to do this myself and get some clamp on tips. Right now I'm not a big fan of the oval tips, would like to install some round tips that aren't slashed preferably in black, grey or satin. Suggestions?