I've used Beselers and Omegas and would recommend both. I'd used a 23C in a classroom-type darkroom and they held up very well, so that was what I bought when I built my darkroom. Pricewise, it depends on the condition and goodies that come with it. There's a pile of other stuff you'll need if you're just starting out. Most is relatively easy to find, but some are harder than others (and it seems to be just whatever I'm looking for has suddenly become rare).
One thing to think about is whether there's any chance of wanting to go to 4x5. I didn't think so at all when I got my 23C. I am now (and lucked into a Beseler 45MX).