Thanks for these replies. Very helpful. Sounds like the consensus is to go for it if I can swing it.
Of course. This is a no brainer. The GFC700 is just some extra money you add into your purchase and get back in full or maybe even more whenever you resell it.
Today, weather allowing, I will be doing test flights for the development of maximum performance climb fuel flow tables. i expect to gain 10% on the climb rate.
The requirement is a fixed airspeed climb. Only the GFC700 can do that.
And, seeing the above posts, I'd like to say a word for Premier. They are not the least expensive dealer, but Mr Jeff Owen is the most knowledgeable, service minded and honest salesman I ever came across in any industry. If you are willing to spend a bit more in return for getting the best buy around, you should talk to him.