Thanks Gents,
Getting the general idea, looking at costs and what set up has been described above I get the feeling that brushed is a cheaper route but compromises the performance when considering size and weight. I also feel that brushed is a simpler route with less variations involved - am I right?
I have a couple of brushed 150w, 12 to 24v dc motors with a rpm of 3000 to 6000 (the speed increases as the voltage increases), therefore I was considering using them with a 4s or 5s Lipo. My thought was to cap the throttle control so that max rpm is not reached and concentrate on pulling max power out of the motors for short bursts.
Any thoughts or comments please?