Getting a bit of topic.
The main point is people only turbocharge a GTS when they have already owned it and don't want to sell it for personal reasons or whatever. That I can understand.
If you don't own one though, to go out and buy a GTS with the plan to turbocharge it, when for the exact same money you can already buy a GTST is just silly.
It is like going out and buying a VE V6 Commodore with the intention of putting a LS2 into it instead of some one offering you a VE SS for the same money. Really, why would you?
Than on top of all that, you legally can't even drive the turbocharged car, so why go down that path? No insurance, constantly looking over your shoulder for every single cop so you don't get done etc. It just really isn't worth it.