@weinoo I think the square pan is the ticket. This one looks like it could work really well. The USA Pan looked great but I think the listed dimension is interior -- their website suggests an exterior dimension of 17.75" which is too big.
The TeamFar 12x16 pans are tempting but the reviews all seem to talk about warping. I have noticed that with my smaller sheet pan for the CSO and while it doesn't matter for that size, I think it would be a problem for the bigger ones.
@Paul Bacino that is a very nice looking pan indeed — I may need to start making pizza al taglio!
