I want to buy a paellera, a.k.a. paella dish, and am wondering what diameter I should get. Ideally I'd like to be able to feed 6 to 8 people comfortably, more often 6 than 8 (meaning they may eat a bit more than a typical serving, if it's really good - I'm ambitious) without using a special fire ring. I'll be using a single large burner on the top of my range. Does 17" sound like the right size? Also has anyone ever tried the thicker carbon steel paelleras? Like "La Tienda"'s pata negra? I suppose it would be easier to heat up uniformly, and to retain the heat better once the dish is in the middle of the table for serving. Thanks!!