Here?s a quick rundown on the 9600?s ?
The best 9600 pro?s generally come with 2.8ns rated Samsung memory and cost a little more ~ $170 -180 ?this includes ? Powercolor ?Bravo?, Sapphire 'Fireblade', Gigabyte R96P (R96P128D), FIC, Hercules 3D Prophet, and HIS.
The 9600pro?s around $150 will usually have 3.3ns Samsungs which includes ? the Connect 9600pro, Sapphire, GigaCube, and PowerColor. TYAN Tachyon G9600 PRO 128MB has 3.6ns Hynix.
Built By ATI retail 9600pro?s used to come exclusively with 2.8ns Samsung?s but now I think they are shipping with 3.3ns Samsungs --- they cost about $170 but come with a 3 year warranty (most cards only have 1 year). Finally, Gigacube makes a ? ?Ultimate Extreme Version??of the 9600pro which comes with 2.5ns Samsungs and is clocked 400/365 DDR --- quite a bit faster than the normal 9600 pro?s 400/300. The Gigacube runs about $180.
The 2.8?s don?t seem to overclock (345 - 365) a heck of a lot more than the 3.3 Samsungs (320 - 340). So you can decide if the extra $25 is worth it.