Hi bro, i'll think a commercial high power led driver will be easier and they dun cost alot nowsday. If u are a diy kind of person, u might want to try something like this.
http://www.instructables.com/id/Circuits-f...gh-Power-LED_s/
Btw, I checked quite a few china and taiwan high power led. Although they are at least 25% cheaper, they are half the effectiveness.
Cheers
JC