like tim said... what are your goals a fun daily driver you can go either way but if you want to build a race car they both can get extreamly expensive really fast the all motor way is gonna cost you alot because of the machine work and the extreame tolerance those motors run at and the boosted setup can cost alot through all the turbo related goods both are gonna set you back a good deal on engine managment and tuning so it really depends on what you want to do with the car
_dave