If you plan on putting a significant amount of boost(over ~10psi) you should seriously consider doing a good amount of work on your internals. The Duratec lower end has weak sinter-forged rods and problems with throwing bearings due to oil starvation. Not to mention, if you go with that much boost you really should lower the Compression Ratio.
If you are going to put the money up for a $4700 turbo setup you might as well invest a couple grand more and do it right!!
Oh and don't forget the drivetrain, definitely gonna want a Quaife LSD along with a set of Stage 2 shafts from the driveshaft shop...adds up quickly!!!!
