I agree 100% but turbo on an S2000 in my country is mission impossible, I was thinking to buy one already tuned in US and shipped, but after sawing a case here I gave up.
That shouldn't have been a problem. See
http://www.turbomagazine.com/tech/0801_turp_greddy_honda_s2000_turbo_kit/index.htmlfor an easy to install complete turbo kit that gives 299 RWP.
These kits aren't any big deal to install - usually an intense weekend does it.