Anyone know of a way to use a BRUSHLESS spindle motor, instead of the currently available brushed motors?
Yes! If you do a search for brushless spindle motor you can see some examples people have come up with. Unfortunately, most are homemade designs, but there are a few chinese made kits out there:
http://www.amazon.com/Brushless-Spindle-Bracket-Driver-Controller/dp/B00ISM5W46