I need 42" LED TV for about 900 USD. I will use it as monitor for PC, to watch movies in 720p and 1080p (HDTV remux). 1. I'm thinking about buying LG 42LM615S, or maybe i should overpay and buy LG42LM620S, is it worth it? 2. The 42LM615S have MCI (Motion Clarity Index) 200Hz, and 42LM620S have MCI 400Hz. Could someone please translate this marketing gimmick to real Hz? 3. Should i even care about refresh rate, because i will use TV as monitor for PC via HDMI, and as far as i know PC GPU does not provide over 60Hz. 4. Are these two LGs better than Philips 42PFL4007H/12? 5. Maybe someone could advise something better than these LGs? For about 900 USD.