Well depending on how much you really want to spend will determine which brakes to get. I'm personally saving up for a nice set of Baer Brakes
http://www.baer.com/ all round. Pretty expensive depending on which package you get. There is also the Cobra brake conversion which I believe requires 17" tires. You also might want to check into Stainless Steel Brakes
www.ssbrakes.com also I think Brembo
http://www.brembo.com/ makes some pretty good brake kits. Hope this helps some.
Chris