Can't beat the sound of a V8 and that supercharger whine!!!
On a side note...
I'm stationed in Guam and have seen more raptors here than when I was in VA.
I have seen a orange scab, orange screw, black screw, a blue scab, and my wife swears she has seen a red screw here, but I have yet to see it. When I first arrived I was like what the hell! I wanted to be the first raptor on the island haha
When I do get my raptor the whipple 2.9L kit will be going in!
Back to the op,
I would like to see a 5.0 Eco but I say just make the bottom end of the 6.2L with some forged internals and add some boost by way of supercharger. Ford knows the area very well with the past vehicles like the lightning, cobras, and now the gt500s. Look how long it took to develop the Eco with all the R&D and with some of the problems they are having. Besides the diesel and we all know some of the problems with the 6.0 and 6.4(I know they were not ford developed)turbo charging let alone twin turbo charging and direct injection is fairly new to ford in gasoline engines. I say give it a few more years to work out all the minor issues and then they will be bulletproof. Until then I will stick with the a V8 and a good and trusted aftermarket supercharger if I want to add boost.