FICM or Controller?

[turbojarhead]

Hi, I just bought an 06 F250 6.0. Poor mileage, seems sluggish. I am looking at the Gryphon CT Controller/gauge package and a FICM flash.
Should I get the remote programmed Gryphon, flash the FICM, then wait awhile to get the controller? AS far as I am aware, the truck is stock. No leaks or CEL lights. Is there a discount to purchasing both at once? I still have about 4000 miles on the warranty, it is at about 95,500. I plan on taking it to a dealer for a thorough check before the warranty expires. The onboard computer shows about 12.5 MPG, that is empty, in town, not stepping on it, just short drives to work, but I have only driven it for 3 days and am still getting used to it. Boost pressure seems low, but I have not hopped on it yet.
I eventually plan on doing the ARP studs, EGR delete, etc, as time and money allows. I have a coolant cleaner on the way.Just daily driving for now, eventually I will be a towing about a 7,000 pound trailer.
Any help is sure appreciated, thanks, Brad