In my SC10 I run a fusion exceed race 10.5 sensored BL, gives loads of power and the speedo is very programmable. I bought the ickle programmer for the Exceed brushless range, 18 quid well spent.
For my Hong Nor SCRT10 I got the fusion exceed 7.5 HV 550, for the same reason`s as the above post, plus I had already got the programmer. I have a range of pinions for it, from the kit 13 all the way upto a 20. Should be adequate for racing with a 2s. For bashing I have got a 3s