I m building a new computer for gaming and I will be using a 2500k I5 CPU on an ASUS p8z68-v MOBO. I will use 8GB ram. Now the problem I am trying to decide on how to fix is the GPU card. This will be my gaming computer but I am not a rich man, I was wondering which of the two would you guys use. A 5670 HD in crossfire or would go with just one GPU card like the Nvidia 560TI. I am just not sure which will give the most bang for the buck. I know the older 5670 HD cards are BEAST with the higher memory Bandwidth, so I just don't know. What do you guys think?