my oppinion may be biased or it may not be
i have borrowed a novak GTB esc and it worked great! very hard to use it for brushed and brushless...if you go just brushless it will work great! customer service is top notch!
LRP sphere TC edition i own 2 of them awesome speedos! easy to switch from brushed to brushless...service not so great! i waited 2 months to get a esc repaired
comes with it's own lap top (of sorts) to program a zillion different profiles
timming,punch,and a ton of other features...
all three of them are about the same price and size.......the speedpassion is distributed through schumacher usa so customer service will be great! along with there warranty policy! and the fact that you get a handheld programmer and a ton of features for the same price!
right now the speedpassion GT esc is attractive is it the "best" i'm not sure there is a best anything...you will get 200 replies and all will be different...
do some research check out the web sites prices feedback....than make a purchase.
check out speedpassion here =======> http://www.speedpassion.net/