Sounds to me you have already more or less decided for the Turbo and are hoping for endorsement on your choice
Both systems have their pros and cons, which have been debated on many carforums.
On my '98 3.2L 6-speed I have chosen the CTSC for the ease of installation and because it doesn't require any engine mods or serious adaptations, the power (365 WBHP on my car which equals to about 410 Engine BHP) is more than enough IMHO.
Mind you, it will need a stronger clutch and also advisable are better flowing exhaust manifolds and exhaust to get max gain.
With Turbo you can easily get more, but it will require enginework.
Turbo installation will also require plugging into the oilsystem and (if watercooled) into the cooling system.
On a standard compression engine max boost would be about 7-8 psi (0.4-0.45bar) max.
You can get more boost, but the risk of the engine blowing up increases very rapidly with raising boost beyond this level.