thanks Aangel !!
so hardwiring is the best. makes sense.
i think i'll go with the 5.5's just to be more versatile and maybe easier to mount. i'm going to use the rcm quark heatsink mount. do you recomend i use fans and why is the heatsink so much bigger than the esc. and about mounting the heatsink/esc sideways ? anybody got any pics? maybe a template of a mounting plate?