the racepak has it all they can do more than 2 egts, water temp,rpm,jackshaft sensor, play back they are a nice unit but they quite making them in 06 and they suggest to not change the battery yourself,one place still will service them and say most problems can be fixed for 150,so potential for $$ is there for a minimum 4 year old electronic unit that seems most want top dollar for ,the koso is a nice unit I believe the ones with water temps are available but not the same memory as digitron and I like digitrons advertised lifetime warranty...I run a racepak right now with a burt out battery...lifetime warranty sounds sweet to me,I wonder about peoples experience with digitrons warranty program ....