I'd like to see how that performs in a heavy! IMHO, it is more expensive than an Etec brushed motor as you need a large ESC rather than a contactor to drive it. If Hobbyking has it in the local warehouse along with a suitable ESC, that might make it cheaper again. The Rotomax will probably also need battle hardening along the lines of what I did to my Rotomax 1.6.

The Rotomax 150 is over 10Kg lighter than the Motenergy ME-0708 and much smaller, which makes it an interesting option if you wanted extra armour.