Interesting ideas. If only the VXL esc was 4s and not 3s, I would jump at it! Hopefully traxxas will bring out a higher voltage esc sooner or later, then I could run almost any sensored & sensorles motors (within reason). Hurry up traxxas.
EDIT: Is this you?
http://forum.rcdesign.ru/uploads/photo-4415.jpg
I dunno what I was expecting, but... that wasnt it!