No experience with Losi brushless but would think the 6.5 the best option, good price and seem to be well thought of, we run Novak 5.5 in our original ZX5 and is plenty fast enough for racing. Think about Lipo batteries, if they are accepted for 2009 a lot of drivers will switch to them (means there will be lots of cheap secondhand matched NiMh packs around, starting to see end of season selloffs already), but your club (seenotherpost) may already allow lipo’s for club meetings, lots do. Hope this is helpful
