You can buy dubbing cassette decks and they'll work well for converting CDs to cassettes.
Synchro dubbing was a feature found on dual cassette decks that allowed the copying of a tape quickly. The playback deck's transport would control the recording deck, and syncronize the copying of a tape.
In my opinion, the best cassette deck is made by sony.
The Nakamichi is the best tape deck for any sort of recording.
Pioneer makes the best duel cassette deck for copying tapes
Pyle makes a cassette deck that is around 80 dollars.
The JVC TD W354BK Dual cassette deck is great for recording.
Panasonic RQ-SW48VK Portable Cassette Player is great protable deck for your everyday uses.
Honestly, with the change in todays recording environment, I would say the Teac or Sony brand of cassette deck would be the best.
ION TAPE2PC Dual cassette deck has usb on it.
Teac-W860R and Sonys TC-WE475 are the considered to be amont the best. Keep in mind that many cassette decks are in decline and that trying to figure out which one is the best can be a bit tricky.
JVC will give you a slightly better sound from the cassette deck than the Teac.