I am in the process of buying a new PC and I am not interested in building it myself and I am pretty sure I know which PC I am going to buy.
For ~1170 USD I can buy a PC with the following specs:
MSI GeForce GTX 560 Ti TWINFRZR II
Intel i5-3570K + CoolerMaster TX3
8 GB DDR3 RAM 1600 Mhz
CoolerMaster Elite 430 case
CoolerMaster GX 550 PSU, 80+ CERTIFIED!
MSI Z77A-G43 MILITARY CLASS III motherboard
Samsung 500GB HDD
But if I throw in another 33 dollars I will get a Radeon HD7850 graphics card with 2GB of GDDR5 memory instead of the MSI GeForce GTX 560 Ti TWINFRZR II which seems like a good deal, given the Radeon card has twice the VRAM, but I don't know... which card should I get?
If your purpose is gaming, spend what you can on the graphics card, it is the real engine of gaming.
In this case, the 7850 is a stronger card, so the $33 will be well spent.
Do not be influenced by the amount of Vram, or lack thereof.
It really makes negligible difference in anything but the highest end rigs.
Someone from their live chat support recommended the MSI GeForce GTX 560 Ti TWINFRZR II because it has better cooling and is overclocked. He also said both cards were approximately the same strength.