[nonovurbizniz]

all motor doesn't just mean that it's stock what it generally means is that the engine has been built (ie new valvetrain valve's piston's (maybe crank)) this boosts the output of the motor. you can get good horsepower numbers out of a 1.6 SOHC or DOHC but nothing like a turbo. and it'll cost a lot more time energy effort and lay up time (unless you have a project motor) but in the long run you'll end up with a very fast/reliable motor which is the opposite of what you could end up with by going turbo/super/nos.

the main reason people go all motor is so they can say
"yep, she's all motor"

that's about it though. yes it'll be fast and it'll be truely "ready" for a turbo (depending on how you build it).

other benifit's are higher redline (can be a benefit if you're still producing power at those high rpms)
you can essentially pick your power band by using different parts.

the #1 most benificial thing to an all motor car as opposed to a turbo/sc/nos is that the power is almost always there (no spool up) and you'll most likely end up with more usable low end power (again depending on how it's built)

but bang for the buck you should go turbo or SC
F nos it's only there while the tanks full. and it cost's lots to get it filled (you'll just end up spending all your upgrade money on NOS fillups instead).