From the GD-Roms that i have, the main ones that i love (its hard to choose one or two only) jejeje:
-metropolis street racer
-soul calibur (for me the best of the series)
-Jet Set Radio (Art in moving)
-rivals school (great fighting game, but i dont know why is expensive)
-RushRushRallyRacing (a jewel)
-F355 Chalenge (Near Perfect arcade port, a present for your sight).
-daytona usa (from my point of view, better than a port, very stunning, smooth 60fps).
-capcom vs snk 2 (less the comments jajaj)
-Tokio Highway Challenge 2 (not one of the best Dc racing games, but i like the idea of highway battle system and how to upgrade the cars. Graphics are very nice with high sense of speed. I recomend the first part too and play all saga).
With this games you will have hours and hours of fun. And more games that i forgot to mention...