A couple more things. If you're looking to save a few $$$ then look for lens that don't come with the big name. B&L in the US made Zeiss lenses under license. Should be the same thing but you'll hopefully end up paying less.

Old fast lenses tended to be special purpose lenses. Either for press use or something else that needed the speed. I think the big leap I had to make when thinking about LF lenses was the 35mm view that faster is better. If you use a lens at F/16-F/32 all the time does it really matter how fast it is wide open? Or even how good wide open? Which is why I ended up just pushing things all the way to using barrel lenses.