Ace,
As you search for an aftermarket ECU you should take a look at the Pro-M Universal ECU. It is the Ford factory racing team ECU made for Ford to Ford's specs by the OEM that makes their Ford daily driver ECU's.
Ford had the option of going with one of the existing aftermarket offerings for the factory race cars or designing their own purpose built racing system from the ground up. They chose the fresh sheet of paper and built a very impressive system. Now the proletariat like us can have access to the same technology.
The unit comes complete with an excellent Windows based tuning software package, data logging capability and a self learning heuristic that builds your base tune so you can focus on optimizing it for your intended usage, racing or otherwise.
Here is the link =>
Pro-M Universal. The price is fairly easy on the budget at $2K w/o sensors. It does use many of the OEM sensors you may currently already have. You will need a MAF, and dual widebands.
Ford's FRPP business unit was originally going to sell this system over the counter through their Ford Racing Parts franchise. Something went bump in the dark and it never happened. Pro-M, which was founded by one of Fords EFI design engineers who has since passed away, worked a deal to sell the units into the aftermarket.
Very high quality, originally designed for Ford factory racing efforts, and very easy to work with.
I think you'll be impressed.
Ed