I have tried several incarnations of 750 brakes:
Stock
Dual Disc
Dual Disc GL1000 cross-drilled (swapped front end to 76 GL1000)
EBC Dual Disc GL1000 with EBC pads
The GL1000 front end swap was the best mod I made yo brakes and suspension, especially after rebuilding the shocks with Race Tech internals (gold valve emulators and new springs).
The EBC discs are very well made. They are floating rotors so they are MUCH lighter than any stock rotors (even if you drill the bejeezus out of them). The stock rotors do not float and are bolted straight onto the mounts; this is why the stock rotors are so darn thick to prevent warping. I don't think that the EBC rotors stop markedly better than my cross-drilled stock rotors, but they are MUCH lighter. If you do not do the GL swap, you will have a problem because the only EBC 750 rotors available do not fit your model.
I think you can improve your stock brakes by cross-drilling and resurfacing (deglazing) them. Anubis Cycle (El Cheapo) or Goddfrey can do this for you -- with Goddfrey you also get the bonus of having them thinned (and lightened even more). Drilling alone with probably shed about 1/3 the weight, and you will definitely get better bite with the drilled brakes.
Bang for the buck -- I would recommend getting them cross-drilled. You can do it yourself if you have a heavy duty drill press, a few drill bits, a pattern you can download from the forum (do a search), and lots of patience. Anubis can do it cheaply for $45 and the wholes are chamfered (beveled) and you get a resurfaced disc (removes any worn in grooves).