tried to look for the logitech DFGT today...but no luck, everywhere also no stock... anyone got any idea where can i get 1? 

Crap man! My lvl 22 b-spec driver becoming senile now...

My driver is too afraid to overtake anything and letting other overtake...

Here the short review of Thrustmaster T500, i think it is awesome, but i don't have that kind of money to buy these
thrustmaster T500

Means no HP limits, tyre etc?

Car setup is very subjective for each & every type of drive terrain. For example, you can't use the same setup of a Gallardo with R8 V10 because Gallardo has the tendency of oversteering even though both are MR 4wd. What I did is the Anti rollbar, I stiffen up the front & stiffen down the rear. I normally use this on high speed track Like Monza & High Speed Ring.

The type of track also need to be considered in suspension tuning. If its flat track like fuji, nurburgring (the shortest one) I just stiffen the suspension & lowered the car. Dampers too hard you'll be having trouble entering the corner. Camber also plays the part on how effectively can you corner.

For bumpy track like Nurburgring (full long track), I advice against lowering & stiffening the car too much as when the bumpy part of the course right before entering the corner, the tyre has less contact on the surface & you'll just hop straight to the wall or sand.

For the LSD, I'm still figuring that one out.

not all car,only this :

Acura NSX ‘91
Chevrolet Camaro SS ‘10
Chevrolet Camaro Z28 ‘69
Chevrolet Corvette Z06 (C6) ‘06
Chevrolet Corvette ZR1 (C6) ‘09
Dodge Challenger R/T ‘70
Honda CIVIC TYPE R (EK) ‘97
Honda INTEGRA TYPE R (DC5) ‘04
Lexus IS F ‘07
Lotus Elise ‘96
Lotus Elise 111R ‘04
Mitsubishi Lancer Evolution IX GSR ‘05
Nissan SILVIA spec-R AERO (S15) ‘02
Subaru IMPREZA Sedan WRX STI spec C Type RA ‘05
Suzuki Cappuccino (EA21R) ‘95
TVR Tuscan Speed 6 ‘00
Volkswagen Golf IV GTI ‘01