I suspect it all depends on what you photograph; I've had a Horseman 6x12 back for about eight years and use it primarily on a Canham for landscapes in the American West where I want to compress the perspective- and therefore use a 300 Nikkor-M almost exclusively.

More recently its been on a 4x5 Graflex Super D and used for portraits and more intimate landscapes with a seven or nine inch lens.

The format is wonderful and allows a huge enlargement if that is your wish.

Good shooting,