If you're pushing your car hard with any type of track performance, you should just go up to Dot 5. Its not that much more $.
Or go crazy and use some Motul 600 or Motul 660, like I do!
Fluid - Dry boiling point
DOT 3 --- 401 °F
DOT 4 --- 446 °F
DOT 5 --- 500 °F
Motul600 - 600°F
Motul660 - 660°F
I learned my lesson the hard way & boiled my brakes at the track (on my old car):