Check Consumer Reports. They usually have a major issue on electronics at least once a year. I would trust them on issues related to service and reliability for mass market consumer products.
The last time I checked, LCD projectors and treadmills were the only products they recommended buying extended warranties for. However, I take it you're looking at direct view LCDs, not projectors.
The last time I checked, LCD projectors and treadmills were the only products they recommended buying extended warranties for. However, I take it you're looking at direct view LCDs, not projectors.