Very good choice.
I also have 2 T-Rex 450 SE V2 and one of them has the HeliArtist Bell 222 Blue Airwolf fuselage that I made into a Helimedic shopper.
Both fly very differently because of the weight. On the 222 I need a 25c LiPo minimum for Hover but foward flight its ok wth the 15C TP 2100 LiPo.
The T-Rex in the 222 fuselage is extreamly stable but I have to watch my transition from foward flight to Hover do to the loss of lift and the combine weight.
here is a link to some pictures and video of it.
Video
http://picasaweb.google.com/PaulG91/...07135160324754
Pictures
http://picasaweb.google.com/PaulG91/ADayAtThePark
I use the DX7 radio
Paul