Try this!

http://www.homedepot.com/p/Rheem-Performance-55-Gal-Tall-6-Year-50-000-BTU-Natural-Gas-Water-Heater-XG55T06EC50U0/205811156

For your replacement hot water heater, you need to consider the size of the water heater.  I would not pay more for 9 to 12 years.  This 6 years usually can last you 9 years.  This 55Gal with 50k BTU is more than enough to handle a family of 5 people.  It can handle 2 people shower at the same time, plus dish washer on at the same time.