From brand wise I would suggest go for Samsung. Samsung and Sony both use same LCD panel. Picture quality and features are amazing with Samsung. I have 46C550 for more than a year now. I can play all video's via USB (mkv, avi etc.). If Samsung then try to get it from Samsung Plaza if you have one near you. From my experience, I got the best deal at Samsung plaza. The quoted price was 92K. Chroma offered ~84K while Vijay Sales 89K. I got it for 78.5K from Samsung plaza. From what I read during my research, Plasma definitely has better contrast ratio as compared to LCD however energy consumption is more. Plasma is suited for TV's for more than 50 inch size. Read about burn-in for plasma TV's. I think it may not be issue for the newer plasma but good to be aware of.