I decided to make some basic black journals with Stonehenge paper myself and just listed them in my Etsy shop. The covers an interior are nice and neutral so you can feel free to gussy your journal up as much as you like or leave it minimal (or anywhere in between). I am thinking a square white stick with Composition Book
Name ______________would be pretty cool.
One of the other books I like to use is the widely-available Moleskine Sketchbook. It has thick creamy paper and used to take watercolor. The most recent Moleskine seems to have a waxy finish on the paper (too much sizing?) and is not taking the water media the way it used to. If you have already purchased a Sketchbook Moleskine, no worries. If you put a light coat of gesso on the paper, it will work fine.