Hey Ian,
The edge will be fine for unhooking but a better bet may be the Sport II. My team rider Abel is an unhooked rider most of the time and he spent plenty of time trying the Sports and Edges before he finally made his mind up on the Sport II. He rides the 7m and 9m.
He is definately a stand out rider and turns heads when he rides. I think he chose well. Grab yoursef a demo. BTW, they work very well in the surf too.
When unhooking, the Edge can be a little slow of the mark in accellerating and turning when it has no forward speed when you trying an unhooked move and the kite ends at 12 o'clock whilst you make your landing. The Sport is more nimble and quicker to react from a stationary position. It also kiteloops with much more power.
See ya and Good winds,