Either option will more than likely cost you the same. My suggestion is to get the turbo and send your transmission to Level 10. Mainly because it's the easiest way to go.
If you want the 3.0 Duratec and an MTX you will need to find a donor 97-98 car to get the parts from since it's going to require quite a few extra parts. The reason I specify those two years are for the fuel return style some of the 99 were returnless.
As long as you have the money and convictions to follow it through you should have one hell of a car either way you go. I applaude any effort in either direction!
