A better question would be which games aren't any good. Imho the only one to pass up is thayer's quest, not because it's a bad game, but because of the whole keyboard deal.
Btw that keyboard emulator posted, that's so you can use a pc keyboard on a tq laserdisc (which I'm assuming nobdy has), it doesn't have anything to do with daphne.

The upcoming release of daphne will allow you to put any digital leisure dvd in your pc and it'll verify and download the appropriate, pre-ripped video.
Cliffy was "remastered" using the original dvds like you said, but afaik the guy who did it fell off the face of the earth and it was never released. Tq was released for dvd rom recently, but imho it looks awful, mainly becuase they couldn't get ahold of the master and well, tq has crappy animation ayway. Of course dl, dl2 and space ace have been out there for ages.
The rest of the games don't have dvd versions available, although the upcoming daphne will apparently help you locate rips of the laserdiscs.