If you wanna go for a size bigger than 50 inches, plasma is the way to go for now. LCDs and LEDs of those sizes are just too expensive. For example an LG 60PK550 plasma would cost 112k while a 60PK950 top end LG plasma would cost 137k. Whereas for an LCD or so called LED, you would pay much more than 200-220k.
I recently got an LG 50PJ560 plasma with superb speakers and I just love it. Got it for 59k. It is not full HD. Resolution 1365x768, but I play 720p, 1080p blu ray rips and don't find much difference. We sit at around 15 feet to watch in our living room. At anything more than 10-12 feet, full HD really doesn't matter. Your eyes won't be able to perceive the difference.
---Venkat