I think the best two choices would be WilWood or Stop-Tech (maybe Tarox but I have no experience with them so I can't vouch for them). I have the Stop-techs and let me tell you, they're awesome. I swap pads at the track to PFC 08 compound and just forget about it. I've done 8 track weekends on them (I think around 20 track days) and just got a crack big enough for me to want to change the rotor rings out (the pads are still at around 1/3 left which is astonishing). They are extremely beefy, take a hellova beating, and work time after time. I run in the upper intermediate classes and am quite hard on my brakes, so for them to last this long has really impressed me. Before the Stop-techs I was running the stock brakes and DTC-60s and killing a set of stock rotors in a weekend.
I've had more limited experience with the Wilwoods, but my brother (a Ford Field Service Engineer) runs the Wilwoods on his dedicated track car, and will be replacing them with Stop-techs this winter. In fairness, they have taken quite a beating with him, but he has to bleed is brakes every weekend and is running through rotors in two weekends. They just aren't as well made, which is reflected in the price and mass difference to the Stop-techs.
If you're easier on your brakes and won’t be going to 5,6,7 or 8 track weekends a year, I would probably lean more to the Wilwoods just for weight and cost savings. If you're going to be running frequently at tracks and want to have a dead reliable brake set-up that you can absolutely pound on, the Stop-techs are the way to go.
Shoot me a PM if you want and we can talk more, but that is my anecdotal experience and advice based off those experiences.