http://www.trextuning.com/4s-supertest.php


This little comparison here would do a far better job than anything i'd suggest in terms of motors for a 450 heli.

Realistically, for what you want, just about any of the motors on that list would do fine. A surprise to me was that the Align 430L is on that list. I didn't think it was rated for 4 cells.

The Align 430L is a nice motor. I've actually got one here that I used a while back on my X-400. I think it come standard with a lot of the T-rex kits now doesn't it?