I have two 12.5 gallon stainless conicals. Two are needed for frequent lager production.
I like the stainless over plastic, and the dump and racking valves keep the trub out of finished beer and allow for easy hydrometer readings. I put in 10-11 gallon batches and have never had anything but CO2 come out the blow off tube.
They were not cheap, but not too bad as I bought them on ebay. I do not know the makes, they are similar to each other but not like anything I have seen for sale lately(one might be a first gen Spike), I brew a lot and for me they were worth the investment, but of course are not needed to make good beer.
Used to ferment in heavy old glass carboys, and still have several. I'd use them for cider or mead experiments, but am glad I do not have to use them regularly, I'm sure I would have dropped one by now.