I was looking hard at the HBK2 once Michael found out that going brushless on the Walkera #4 wasn't really feasilble. However, looking at the size of the HBK2, its rotor disc diameter is only 2 inches shorter than my TREX! I do not want a TREX competitor, I want something to learn on and have fun with. I think I am just going to go with hte stock Walkera #4 plus some upgrades and an AR6100 Rx so I can fly it with my DX7.