My other half currently has an i5-2500K (stock) and a GTX 770 (2 GiB VRAM) with a 24" 1080p monitor. She wants a larger monitor but is unsure whether to go for a 1080p 27" one or spend double the money and get a 1440p 27" one. She plays fairly modern games like Diablo 3 and Counter-Strike: Global Offensive. Would a 1440p monitor be viable without an upgrade? If not, the cost difference would obviously increase much more.