Some advice please...I need a new water heater!

[1926Homeowner]

I am the proud new owner of a house circa. 1926 and I need a new water heater! I have been doing some research online and have found some helpful websites, one is called ILoveWaterHeaters.com . There is so much information that my head is spinning – heat pump/gas/ electric, tank/tankless!?! I would like to be an educated consumer as this is a major appliance that I don’t want to have to replace for a long time...Marathon says they have a lifetime warranty! Anyone out there have any advice or good/bad experiences that they can share or other resources that I could use?