We've been using a More Beer 14 gal. conical for a couple of years now. We love it! You can pressurize it and fill your kegs through the out post. If you force the Starsan out with CO2 and then fill thought the out post you never oxygenate the beer. They make plastic ones but my partner refused to heat up the cleaning water and it ended up making funky beer. He wouldn't heed my advice and ended up suggesting stainless, which I wanted to begin with. I stopped debating at that point and love the fermenter. It will take up to 5 psi of pressure for keg filling.
In my opnion this is the best one on the market today: