Turbo = expensive, hard to install, need to find a place for an IC, hard to tune, and hard on engine (really should upgrade internals). Yes it does produce more HP/TQ than SC.
SC = cheaper than turbo or a high power NA buildup, easier install, no IC required, easier to tune, and easier on engine.
Nitrous = cheap in the short term but requires refills, very easy to install, very easy to tune, really good power increase, but its not all the time power.
NA = for any real power (beyond 170HP) its just not worth it.
