Spiny Norman :
I was thinking that there is a card that would match the other components. For instance it wouldn't be worth buying a $500 card with other components that wouldn't allow the card to work at it's full potential. Similarly a really cheap card would mean that the CPU, mobo etc.. were too good for the card.
Does that make sense?
in most games, any modern CPU within the last 5 years or so can handle a 780, even in SLI, with little to no bottleneck. at it's worse, you'd be limited by CPU intensive games like Starcraft II which is notorious for being biased to intel CPUs, & unoptimized messes like ARMA 2/3.
http://www.hardwarepal.com/battlefield-4-benchmark-mp-cpu-gpu-w7-vs-w8-1/14/
http://www.hardwarepal.com/best-cpu-gaming-9-processors-8-games-tested/
http://www.tomshardware.com/reviews/gaming-processor-frame-rate-performance,3427.html
so really, you have a wide range to pick. it just comes down to the question of your budget.