I have a 2GB Gtx 670. Right now I have two 24" monitors (1080P) and I want to add a third for gaming. Should I bother getting a second GTX670? The price hasn't really come down even though the new Radeon and Geforce cards are out. Are any of the new cards as fast as two 670s? BTW: my cpu is a 3770k on a Gigabyte UD7 MB, so bottleneck shouldn't be a problem.