New Monitor

Hi there people, Im looking for a monitor for gaming purposes but too much choice on the market for me to decide what I want, even unsure what size I want to got for 24" or 27". Ive set aside £300-£350 and games will range from Eve online to RTS and FPS games and using a GTX970 and an I5 4690k if thats any help

Thanks for any help

New Monitor