Do I really need to spend $200+ to get a GTX 1080 over a 1070 for 1440p gaming? I will be getting an Acer XB271HU monitor if that makes a difference. Also, I would like my PC to last for at least 2 years without needing to upgrade. Preferably 5. But I DO NOT want to spend $650 or more for a GPU that will only do well at 1440p for a year. Please help!