The amount of boost you run is dependant on the size of turbo and other factors. IMO if you are going to daily drive it, I wouldn't turbo it with stock internals. Then you have more issues that you have to make sure are taken care of. I would go with the internals for now. That way the motor would be built and still maintain reliability. Then in the future if you decided you wanted to boost it, you wouldn't have to change all the internals and you would see bigger gains... but that's just my .02