I've read a few which was about the DCAU but those didn't have any ongoing plot (like the cartoons had), but there were some high profile writers on it (For example: Dan Slott).
I'm not a big fan of these tv show spin offs and outside of Buffy haven't read any.
Morrison's JLA is really good for a DC newbie, it is very self contained (there are one or two continuity things, but nothing major) and straight forward compared to other Morrison books.