I had a Gen 2 Carrera S which i traded in for the Gen 2 GT3 last June, for more or less the same reasons as you. Take the GT3 for a test drive; i dare you not to be sold on it after 1km !
The GT3 is such a fantastic car. I know you should never say never, but i will never part with it.
My reading of your post is that you are getting into track days, therefore i would recommend the GT3 .2 like mine. The new RS is a fantastic car, and i often think what if ? but then when i drive it on the roads and track i just cannot think of a better car.
I would also say that the ability of 8/10 drivers will never be able to extract all the GT3 has to give and thereby require the new RS. Save a few pennies, get the GT3 and then invest in some driver training.
Comparing the new GT3 against the original 997 RS, i think items like the new PCM3 (If you read Chris Harris's running report on his Mk1 997 GT3 in Evo this month, you will see he misses not having PCM3) , Lift system and dual mass flywheel make for a better road car. Having said that, mine only gets occasional road and track use, as i have a daily hack for work.
If you do go for a .2 GT3 then i would recommend seeking one out with the following options (Note this is my opinion)
Lightweight bucket seats (Great support and driving position as you sit lower in the car, also the most comfortable on long runs)
Clubsport
Dynamic Engine Mounts
Lift System
PCCB Brakes
PCM3 (Great system)
Don't bother with the sports chrono package as it does nothing for the exhaust/ engine performance on a GT3. (You get the sport button regardless)
Quick pic of mine at Oulton Park last October..... Resistance is futile !!!!
