I am looking for a good motherboard with dual GPU setup for intel platform.Can i go for the Nvidia 650i SLI?And i want a good graphics card too at about 8K.Should i go for the Nvidia 8600gt?Is there any difference between a XFX graphics card or motherboard with Nvidia chipset and the same series mobo or graphics card from Nvidia?Will they provide the same performance?Say, XFX n-force 650i SLI mobo and ASUS P5N-E mobo with the the same 650i SLI chipset.Which will be better?Please give the price too for any new item.