quote me where I'm talking about price/performance my friend

multi-GPU with microstuttering and none guaranteed performance boost is always a gamble. So going single GPU the HD4870 is an excellent choice for anything below 1920x1200. At 1920x1200 you might be better of with the GTX 280 if you have the money.
that's all I said, nothing more, nothing less.
Future-proof wise, heat wise, power usage wise, single GPU >>>>> multi-GPU. Most of the time also price wise, but HD4800 is exception to the rule thanks to high NVIDIA prices
