ATE Super Blue and it's "other color" twin TYP200 (gold color) is an excellent high performance fluid that will work great for track use or wherever extreme braking is used.
Both have a wet boiling point of 392 degrees which is at the low end of the DOT4 level. Not as high as Castrol SRF or Motul fluids, but still high enough to take HPDE days at most tracks.
If you don't do track days or extreme braking, even a good DOT3 like the Ford Motorsports HD fluid, Castrol LMA, or Valvoline fluid will work and at a much lower price than ATE fluids.
Figure on about a quart to do a complete flush of the system. When I do track days, I flush the system before the event and may even bleed the brakes at a lunchtime brake if I have gotten the brakes to where the fluid may have boiled.
Brake fluid can get pricey if you use a lot of it. So if your driving is mostly street duty or an occasional autocross, consider the DOT3 fluids. They work fine and are available in most auto parts stores. I looked at ATE fluids but there is only one shop around here that has it and every time I tried to get some, they were out of stock and said at least two weeks and $24 a quart.