IMO all the race cars that deserve premium (Also voted for these in the 3 polls)
Alfa Romeo 155 2.5 V6 TI '93
Audi A4 Touring Car '04
Audi TT-R '02
Audi R8 Race Car '01
BMW M3 GTR Race Car '01
BMW V12 LMR '99
Chevrolet Corvette C5-R '00
Dodge Viper GTS-R (Team Oreca) '00
Ford GT40 Race Car '69
Ford GT LM Race Car Spec II '05 Formula Gran Turismo '04
Honda NSX GT500 '00
Honda NSX GT500 '01
Honda NSX GT500 '03
Honda NSX-R Prototype LM Race Car '02
Jaguar XJ220 LM Race Car '92
Lancia Delta HF Integrale Rally Car '92
Lancia Stratos Rally Car '77
Lister Storm V12 Race Car '99 McLaren F1 GTR Race Car '97
Mercedes-Benz 190E 2.5-16 Evolution II '92
Mercedes-Benz CLK-LM '98
Mercedes-Benz CLK Touring Car '00
Mitsubishi FTO Super Touring Car '97 Mitsubishi Lancer Evolution IV Rally Car '97
Mitsubishi Lancer Evolution VI Rally Car '99
Nissan 350Z GT500 '04
Nissan GT-R Concept LM Race Car '02 Nissan Skyline GT-R Group A '93
Nissan Skyline GT-R GT500 '99
Nissan Skyline GT-R GT500 '00
Nissan Skyline GT-R GT500 '01
Nissan Skyline GT-R GT500 '03
Nissan R390 GT1 '98
Nissan R92CP '92
Opel Astra V8 Coupe (Opel Team Phoenix) '00
Opel Calibra Touring Car '94
Pagani Zonda LM Race Car '00 Panoz Esperante GTR-1 Race Car '98
Pescarolo C60 Hybrid - Judd '05
Peugeot 205 Turbo 16 Evolution II '86
Peugeot 206 Rally Car '99 Peugeot 905 Evo 1 LM '92
Renault 5 Turbo Rally '85
Renault Clio V6 Trophy 24V '00
Spoon S2000 Race Car '00
Subaru Impreza GT300 '03 Subaru Impreza Rally Car '99
Subaru Impreza Rally Car '01
Subaru Impreza Rally Car '03
Suzuki Escudo Pikes Peak '98
Toyota 88-CV '88
Toyota Celica GT-FOUR Rally Car (ST185) '95 Toyota GT-ONE (TS020) '99
Toyota Supra GT500 '00
Toyota Supra GT500 '01
Toyota Supra GT500 '03
I've also bolded all of the real cars that I feel need to return as premium to the next full GT release (GT7).
I'm not expecting all years of the GT500 cars but them returning in some form would be nice.