Russ, I also like San Marzano tomatoes very much. Tremendous sweetness–they’re picked ripe rather than while still partially green.
However, with prices climbing for Italian tomatoes generally and especially for San Marzano’s (blame demand and the weak dollar), I’m always looking for less expensive products that are comparable. CA-grown tomatoes are good but just not the same in my experience. Nevertheless, I’ll watch for the 6-1 brand and give ’em a try. Thanks.