Akira, you work for the Honda marketing department don't you! You must do....
I've driven all 3. The most unsporty is definitely the T-sport, but its great as a 'normal' car, and the engine is just as good as the type-r's.
The Civic is fast, but like someone said, its steering is mushier than peas. The two I tried understeered too much as well. Looks the part though.
Naturally the 172 is the best, and it doesn't need to be justified.
Incidently, Toyota UK are dropping the corolla T-sport soon. Last models have supercharged versions though!