4x5 Pacemaker Speed Graphic w/135mm Optar: My first "ready-made" large format camera; which I bought after having built and used a monorail 4x5 kit camera and decided that I was into large format for the long haul.
Pre-Anniversary Baby Speed Graphic: I got this one at a bargain basement price because it was in bad shape cosmetically and the focal plane shutter did not work. The bellows, however, was (is) in good shape. I took out all the shutter mechanism, removed all the crappy leather covering and refinished the wood. Semi-permanent installation of a 6x9 roll film back and a rigid wooden/aluminum handle made it good to go.
Also in 2 1/4 x 3 1/4, though not Graphic, a Burke & James as well as a Busch Pressman, (which is a really pretty camera).
Ther are those who disparage the Graphics for their limitations, (lack of movements for ex.); but it is my firm belief that the 4x5 Speed or Crown Graphic is the ideal way to get into large format photography. I think it just makes sense to get the basics firmly in mind before getting into more complicated issues and the, admittedly tank-like, Graphics are ideal for this.
Ria