Since the study group seems to not have taken off, may I suggest the 3 excellent books that Rachel Pollack wrote? you can find them at reasonable prices on ebay..
I picked up all 3 for about $45.
These books really give the depth to this deck that it deserves.
The Haindl Tarot - A Readers Handbook is great for day to day use.
And the Minor and Major arcana books are excellent for indepth study.
I first dismissed this deck because of the "muddiness" of the scans but I'm so glad I picked up the smaller deck on a whim, up close and now with the books I'm finding that this is one of the best decks for meditative\contemplative personal use.
My interest in tarot started out of my own practice in engaged Buddhism, and mindful living, and in looking for Mediation type cards I found Tarot.... well many decks later, and having walked through the wonderful door into the world that Tarot is. The Haindl seems to be one of the few special decks that have resonated with me in that it merges both practices into a beautiful, complex useful whole.
By the way Another deck that I hold very dear in this respect is one called The Game of You, by Lynn Zavaro. While she uses the structure of Tarot, and many wonderful Budhhist teachings, she never mentions either and so because of this it is an incredible powerful tool and open to those who are unfamiliar with either discipline.
I'm also waiting for the large german edition and plan to trim the titles and white borders to make it the wonderful borderless deck that it should be.
I have the regular size with english titles to use and the large one will be mainly to study along with the book and see all the subtle details on each card.