This is all great and spot-on advice, and I'll echo: "Go to a commercial restaurant supply and ask what real restaurants buy for a given application" to find out what commercial gear is really used and easily available(and serviceable, this is also key) in your area.
A lot of the "fad" of putting commercial styled stoves in houses has ended up with many pseudo-commercial ranges on the market, culminating in the now ubiquitous stainless steel skinned residential stoves, refrigerators, and dishwashers, none of which are really commercial equipment.
Even many "commercial grade" equipment sold for residential use is really nothing more than a reskinned imposter and isn't the make/model an actual commercial operation would use.
As some have mentioned, most commercial equipment is very simple.... on purpose. Ranges are simply large flat expanses of cast iron burners, with a valve. They are durable, but simple, and have been a tried and true design for a century or more. And most commercial gear isn't very attractive, unless that "purpose built" practical and industrial look is what one is looking for. In reality, most homeowners do not want this, although they may think they do.
I can't recommend a particular brand or model, but again I'll suggest dropping into a commercial restaurant supply. Even if you don't buy a range, the trip is usually a lot of fun anyway. They just seem to have neat stuff in general
If one is just looking for a very durable and practical stove, versus specifically a commercial unit, a vintage range from the 1940s through 1950s is another alternative. They are usually built like "tanks", incorporate simple tried and true mechanical systems, and work very well, not to mention are often very attractive. Do a search on Chambers, Okeefe and Merritt, etc and one may find a stove that wins your heart. I'd bet a few of these old stoves are built even sturdier than some modern commercial units. We have a smaller O&M and even after we disassembled half of the stove, it still took three grown men huffing and puffing to lift the thing!
Here are some examples:
O'Keefe & Merritt Retro Classic antique stoves examples
Chambers stove by Antique Gas Stoves
KEEP YOUR CHAMBERS RANGE!!!