My research has led me to the following:

The original discussion on dji forums: http://forum.dji.com/forum.php?mod=viewthread&tid=1514&page=1#pid11247

Here is saying that the Phantom 2 is hard to beat, the all up package is around a thousand. But the flamewheels maybe will date less quickly than the Phantom. But the flamewheel needs to be packaged up and these guys offer this..

http://www.marionvillemodels.com/rc-shop/dji-f450-flamewheel-naza-light-readytofly-package.html

So I will look to see what the flameweel vs phantom 2 bundle could work out at.

399 + gimble h3 3d zenmuse - 249  +fpv set up approx 310 .. its coming out at almost the same. So the flamewheel looks like it could be a go. What does the thing weight compared to the phantom 2 ?

You would imagine its a lot lighter. The FPV setup must work through the gopro hero 4 black edition.

http://www.quadcopters.co.uk/dji-phantom-2-fpv-edition-with-zenmuse-h3-3d-gimbal-1249-p.asp

Approx 1000 including the fpv and everything..