a top perfomance "kit" can be placed together for under $150 if you spend a little time and do some homework. If you just buy a ready made kit, you'll end up spending too much money and might end up with only average performance.
ALso make sure your tubing doesnt kink in the middle when doing tight bends. Go for either Tygon or go for Clearflex 60 which is half the price and very good. Dont bother with the cheap stuff at Home Depot, I wasted money on that. In reality, I would say about $150 wuld you get a serious killer and hot looking kit.