I'm building my first gaming PC ( http://pcpartpicker.com/p/8vyhnQ ), but I'm having a hard time deciding what card to get. This are the cards. http://www.bestbuy.com/site/nvidia-geforce-gtx-980-4gb-gddr5-pci-express-3-0-graphics-card-silver-black/9855141.p?id=1219441205886&skuId=9855141 or the http://pcpartpicker.com/part/msi-video-card-r9390gaming8g? I only have a 29" 1080p monitor.