I'm looking for a new tank style water heater and I have a few questions.

1. The R factor of the insulation varies from heater to heater. Do water heater insulation blankets work very well?

2. My 27 year old James Woods heater has legs but most of the new heaters do not. Is there a reason why most new water heaters do not have legs?

3. What should I be looking for in a good water heater?