Hi,

I think the T-Rex is a good build, the parts go together well, it's simple and it flys well. As for the Zoom 400,I have little experience of this so for me the T- Rex is more of a known quantity[8D].Also it is a good all rounder as it is quite stable but as you progress it will also perform 3D manoevers like a 30. or 60. size heli. It's also quite new out which is good as it will stay up to date longer[8D]. I would recommend a brushless & li-poly set up & a heading hold gyro.

Hope this helps.

Greg.