i've heard the prophet 2 mx has the best 2d quality out of them, i'd get that probably worth the extra $20-30. The oem has 7ns ram the retail is 5.5ns, its about a $30 difference (120 vs 150) but the speed difference is probably not a big deal. The ram is rated at 7ns but that might be at a certain latency so they probably lower it to make it to 166mhz. Shouldn't be a huge difference might be worth you $30 to just get the cheaper card.