1. Budget.
55-60k +5k ok if thats really worth it
2. Viewing distance.
8-10 feet
3. Sources/inputs such as HD DTH/consoles/stand-alone media players etc.
DTH/PC
4. Preference for plasma TV/LCD TV/LED-LCD TV.
LED
5. Preference for brands.
Sony/Samsung/Panasonic/LG
6. Willing to purchase it...