I like how my 8 drives.. I think turbo'd 8 does sound great.. but I'm curious how reliable it would be (as street car).
I bought a renesis motor that came out of a turbo 8 (blown motor) and it was toasted.. all 3 apex seals are gone! But the side seals were fine

I'm guessing its similar to why some of us don't use high compression rotors + high boost... its bit more difficult to tune but you do gain bit of low end torque and power.
I think if I see consistent results with the set up, I might consider it. But if you add the cost involved, its still hard for me to justify. FD with BNR stage 3, upgraded IC, with 2 more 850s and it will make close to 380 in sequential set up... that's total of maybe 15-16K for the set up total (including the car).. Or buy one built for about 16K +/- 2K.
I just like how my 8 is now.. Its a good daily with back seats that I really don't use as I don't have kids and my wife hates riding in it... 90+% of time, I'm the only one driving it.. My next daily will be a G35/37.. prefer auto as I'm sick of shifting gears and want to be on the cell phone while I drive to work and home