The problem with DTC-60's on the street is that they will eat your rotors. They are designed to operate in a temp range that is much higher than what you will achieve on the street and even on an autocross course. They do work cold (unlike some race pads), but they are not operating as designed and are basically chewing up the rotor instead of bonding to a pad transfer layer. They will also be inconsistent in an autocross setting, as the braking friction will vary widely as the pad heats up.
If you want more bite on the street and for autocross, and you like the Hawk line, use the HP+. HPS is also good, but less bite.
For my autocross 2, I found no need to go beyond the stock pads.
I drive my track car (CRX) to the track. I used to simply leave the DTC-60's on for the 45 minute highway trip, but found that the slight drag that floating calipers deliver during cruising will eat the rotors up. So now I swap at the track between HPS and DTC-60.
Edit: There was a nice test about a year ago in GRM done by the Tire Rack guys at their test facility (they are a Hawk dealer). They tested OE, HPS, HP+ and DTC-60 on an MX5. Their results agree with what I found. No better braking with DTC-60 over HP+ and inconsistent. HPS in between OE and HP+.