Adult Swim is the best source of 'as good as it gets' anime on TV in the US, as far as dubs go. The shows they produce are rarely 'Americanized', especially the most recent additions of Eureka 7, Bleach and Blood +. The stuff that comes on after school, or saturday mornings, does not make for very substantial watching.

I actually prefer 'original works' anime, things that are *not* based off manga. Like Eureka 7 and Blood +. That way there are no fankids to complain about fillers and 'that's not part of the story'. The majority of manga-turned-anime that come to the US tends to be of the Shonen variety.