I agree with cuda, I have a Trex, Evo 50 Hirobo and a Raptor30v2. If you want a hard 3D machine go with the set up cuda said.. .50 hyperaptor. If you want stability and tracking, go for a Hirobo Evo .50. Credence is right, the Trex will do anything 3D about twice as fast as anything else I own. But it better be a still day...
Take care,
Jay