I asked the guys I race with on what they used and would buy if they had to again
SG car
Bought the Edelbrock unit with the added sensor upgrade... really likes it... would buy another one
SST car
Bought the Autometer unit. very easy to install and would buy again
TD
Racepak. with the dash. Had some initial problems with RF Interference. Sorted that out works great. Bought a TS car and bought another racepak
TD
Computec with the dash. had RF issues also, had to do with the MAG circuit too close to the computer... we were at Sema and had a bunch of photos and a diagram. their engineer showed us the problem right away Works good, would buy again
SST (mine)
Racedata with the dash. works good, would buy again. did not have the the RF issues, but I do not run a Mag and I installed every thing I could behind the seat so the box is far away from the MSD
I personally think that the Computec and the Racedata are the same unit, but I could be wrong.