I have a soft spot for my old Diamond Stealth TNTcard it was the first graphics card I ever modded by adding a 40mm fan to the passive heatsink. I think it was also the first card I did any bios modding on. It was also a very noticeable upgrade from the 3DFX OR card that preceded it, and it the card that really made me realise this 3D gaming lark was going to be a proper thing.