Yeah, I believe they discontinued the 30 inch widescreen version late in the SFP incarnation. But they did make a 30. Looks like there were 2. Here's the chart detailing the models with Super Fine Pitch.
http://en.wikipedia.org/wiki/FD_Trinitron/WEGA
I worked at Circuit City during this time, but we never got any of the SPF 4:3 sets in, so I never got a chance to play around with them. I would guess for gaming a 4:3 would work best for a lot of games. But some of the newer stuff you may want to pick up a 16:9 (again only in a 30 and 34).
And as always children you need to remember Light Guns will not work on any of these CRT HD sets. No matter how hard you try.