Glad you live where the fun roads begin :) As for pricing, here are some examples/comparisons:
>>>17" BBS RGRs and putting tires like the PS2's one them ($2k to $3K)<<<
Kinesis are around $3,500. In the end with tires and enamel centers the entire bill was $4.5k
>>>...a better clutch ($700)<<<
Try around $2k for race clutch or so and i think it is even more for a carbon/Kevlar setup. Of course one would also want to go with a light weight flywheel at the same time :)
>>>upgrade brakes front and rear (bigger and lighter for even less unsprung weight... probably another $1K to $2k.<<<
$2,500 for front Brembos including floating rotors with alum centers. Rears are trickier for the Ferrari 308 and the ex-Brembo designer who i have been talking to now had his own company. He is working on a really tweak setup that should be 'only' $5k for front and rear with floating rotors/aluminum centers BUT i would have no emergency brake.
As you know, lowering the unsprung weight (lighter rims/tires) and tweaking the suspension is a great start. Then brakes BEFORE adding more power/clutch/etc. Then there is... Sounds to me like you got a GREAT plan and those GTi can go and go and go :)
Funkin'groovin' cool dude :)
Will you be at the Denver show? Let's talk ;)
By the way, are you going to do some weight reduction with the car via interior stripping, race seats, dump the air conditoning, etc?