Depends what power you're intending to run in the long run, Omex 600 isn't sequential so you can't run big injectors without having nasty emissions at idle.. I normally run 600 on sub 400hp cars and for the price it's a decent piece of kit, if you want sequential and more options then 710 is the one to go for. If your budget is for a 600 then I'd also look at Emerald as that does sequential for the same sort of money. Properly mapped all mentioned will drive nice. You would also need to consider injectors as they all run the high impedance type.