lrp, nosram, novak, speed passion etc are all good easy to use speedos that all fit 2wd's ok if they come with fans they usually don't fit in most 2wd's but they arn't needed for 2wd anyway 99% of the time (more for 4wd), these all just need 1minute of attention setting them up then you don't have to fiddle with them ever again
the losi are hassle and make racing unenjoyable in my own opinion as seen so many people fed up with them having software curruptions, memory loss and other annoying problems that the brands i've stated above don't have any of these problems and are all very reliable and user friendly