Hi Mitch, if I can give some suggestions, because I know myself only recently how overwhelming the ciliate field is.
Kahl still has considerable authority, and even without german knowledge you can flick through the drawings. His magnum opus can be found at
http://ameba.i.hosei.ac.jp/DB/DIB/Kahl/index.html Warning: it is enormous in size.
Kahl did start a revision, just before and during WWII, but it was subsequently lost and only part has been recently found back. It is downloadable for free as a supplement of Acta Protozoologica at
http://www1.nencki.gov.pl/pdf/ap/ap812_supplement.pdf
This critter is in there. For an amateur, Kahl is a good way to start, his drawings are very much to the point! Now for the german language...
Corliss came next with a thorough revision when ultrastructural details became available in the 1960's. The figure tables can be found on a german site
http://www.peritrich.de/Ciliata/index.htm , see the link Abbildungstafeln. Those give a good oversight over the whole of the ciliate cosm.
Latest major revision is done by Denis Lynn, which include phylogenetical data. But that sort of work is really out of touch with amateur practice. Details about that newer classification can also be found on that german site.
Good luck, René