I went to the basement to get a can of paint this morning and the floor in front of the hot water tank was wet. It looks like it's leaking from somewhere on the bottom, so I'm assuming this is a terminal situation. I've always told myself that when the tank dies, I'd put in an "on demand" water heater. Checking prices at Lowes and Home Depot have me reconsidering that thought. A new gas-fired water tank starts around $500, a gas-fired tankless heater runs 3X that! Yikes! I'm looking for some advice here, but I'm pretty sure the tankless heater is not gonna' happen. So, given that, what's a good hot water tank, any opinions on that?