http://www.precisionbrakescompany.co...ductdetail.asp
That's one of the vendors that advertise on this forum. This is a Wilwood 4 piston caliper hat/12" setup. The price is a little cheaper, and it's possible that another vendor may beat that price. It doesn't include braided teflon lines though. I don't know if that's included with the SSBC kit.
SSBC is a well respected company. They're in the import market, but are strong in the domestic/muscle/street rod too. I think if you go with their product you'll be happy with the result. The same goes for Wilwood Engineering. I would look at the features versus price to determine which kit to go with.