Contrary to what your plumber told you this a residential heater. I purchased a 40 gal Turbo 25 yrs ago on the advice of a few plumber friends. It was made by State and probably the best appliance I've ever purchased. Not cheap but it was worth every penny. The design was similar, it had a coil in the tank that preheated the water which dumped out on the bottom of the tank. This keeps the tank clear of sentiments thus maintaining efficiency and extending tank life. That tank is still running flawlessly today.
Here is a link

http://www.statewaterheaters.com/lit/media/catalogs/res-catalog.pdf

Another major benefit , we never ran out of hot water.
Two adults and three children

While it is a residential tank, it is a 74 gallon, high input (75,000 btu) which does come at a cost premium.

Jonny, "turbo" had no special coil, just a means of using the diptube to stir the bottom with the idea of keeping falling sediment moving.

We need to get a new gas hot water heater soon. Is State the best one or are there other brands we should consider? I think there is a brand called White?? I would like some recommendations before I call my plumber next week.

We have an old 40 gallon Kenmore now and run out of hot water fast. We want to order a higher gallon one this time.

Thanks much.