LEDS will probably generate less heat than a similar amount of CFL, and that's usually a good thing indoors. Mars hydro makes good lights for the money, you might be able to get a better deal on one by chatting with Tina in the Mars section here, I'm not sure if she's running any deals at the moment.
With the led, the CFLs you already have can give you some extra side lighting. I think you'll like LED as long as you have enough intensity per growing area. How big is your grow space? You can cover about 2x3 feet with a 300, but I'd figure 2x2 with high intensity.
Good luck, bro.