I recommend anything these two produce on vinyl. The newest one is the only one I haven't picked up yet (been on a classical tear lately) but I'm looking forward to spinning it.
My fingers are crossed that they will release Gillian's earlier albums (technically Gillian albums, but Dave is always present, and vice versa). They are wonderful.
If you have a chance to see them, do yourself a favor and get as close to the stage as you can. I saw them at the Ryman and had to be rushed to the hospital after the show for acute goosebumpism.