Lots of great answers in here! As a freshly minted (relatively) LF photog myself, let me share my experience with you.
I started with a Toyo 45F monorail and a Schneider 150mm/265 convertible in a Compur shutter. That is a fabulous lens. I couldn't believe it when Ken Rockwell turned out to be right about it
I then got a Graphic lens board adapter for my Toyo. I mount all my lenses in Graphic boards and they can go on the TOyo, or on the Super Graphic I bought with a Fuji 135 and an Optar 90.
I got an Optar 135 from The Bay. Had the Fuji CLA'd at Flutot's Camera Service, thinking it to be the better lens between the two. After some comparison, Kept the optar, sold the fuji.
I also happened upon a 75mm Rodenstock which *just barely* has enough focal length to use on my cameras, and found a Schneider Xenar 210/6.1.
So I now have 2 Optars, A Schneider Convertible, a Schneider 210 in a Copal, and a ROdenstock 75 in a Copal. This lens kit does pretty much anything I ask of it. I mostly shoot LF portraits and landscapes.
I do want to eventually upgrade the Optar, even though it's adorably tiny, for something a little faster, with filter rings.