Hello! Welcome to YT
. I have the CC 27 mm brush and I loooooove it! I keep my pup in a show cut though so I'm sure you'll be more than happy with the 20 mm. Other grooming essentials you may want to look into:
Espree Plum Perfect Facial Cleanser
Steel Mustache Comb(for knots/facial combing)
CC Day to Day Shampoo
CET toothpaste vanilla and mint
Toothbrush(you can use a baby toothbrush you put over your finger, gauze, etc)
CC Ice on Ice(for tangles)
Electronic nail file(i have a Dremmel (sp?))
Baby wipes(for quick facial cleaning and sanitary wipe downs)
Ok, I think that's about it lol. There are members here that sell the combs/brushes, etc and offer discounts to members. I suggest that you buy shampoo and anything else in bulk once you find one you like so you won't have to pay shipping again so soon when you run out. I have the largest container of Day to Day and it's lasted me over a year.