need some advice for a futue bl project..

[squeeforever]

I, personally, would go with the Quark if you can afford the extra cost. You will need a UBEC for either the MM or Quark as well. The XXL motors should only be about $175 as apposed to ~$90. I think it would be worth the extra to be honest. I had a XL3100 and on only 12 cells it would easily do 50mph with really old 2400 NiCads. I think a XXL would be my choice, and probably will be for my next motor. Mine ran pretty hot, only because of the very high RPM's, which shouldn't be a concern for you.