I have an iMac 21.5 inch and I sm trying to find s dual monitor that can sorta match up to it's brightness and color quality but I don't want to drop and absurd amount to get an apple cinema display. So my question is what are my options . And what are the visual differences between LCD led and ISP displays. I'm very unfamiliar with all this so thanks for the advice and help. Btw I'm looking for a 22-23 inch display