What do you use when viewing amvs? I was always a Windows Media Player 6.0 junkie. Until recently...
Winamp 2.90+ [NOT 3.0] happens to be quite damn good. From a music lover's standpoint, the presets for Winamp allow me to set some pretty damn good settings for the type of music I'm listening to DURING an amv. ^_^
What's better is that it plays some file formats that both DivX Player AND Windows Media Player can't play due to "bad sound codecs..."

Winamp, it really whips da llama's ass! [and now plays kick ass videos too!]