It is rather difficult to find 6 row these days. When you do find it, at a homebrew level, the cost is the same or maybe a bit more the 2 row.
There is a difference between maltsters and the different barley they malt. A larger company will usually blend different barley together, sometimes even different year crops.
These days, I personally, prefer to use single variety malted barley. I do like Root Shoot Genie Pilsner and Genie Pale. I use the Weyermann Barke line up. I also like Crisp Chevallier and No 19 Marris Otter.
You might want to have a basic SMASH (Single Malt And Single Hop) recipe to try out the different maltsters to see exactly which of their products you like.