This page is geared towards TEAC reel to reel tape decks and some general information regarding reel to reel recorders/players.
I bought a TEAC A3440 4 track, 4 channel tape deck because it will allow overdubbing. Four tracks is pretty limited, but still very cool. I bought a custom cart for it which also holds my Moog™ Minimoog Voyager RME.
Interwest Electronics (These guys service all my vintage gear)
Recording Data Services (RDS) (pretty much the only source for new tape)
RMG (manufacturer of new tape, available at RDS)
The Absolute Sound (New reel to reel decks)