AnimeMusicVideos.org

Definitely buy the DVD's and use a ripper and then MKVMuxer and XMediaRecode to convert the files, once you have that, do not upload the full content anywhere. Make your AMV's and then upload those here.

I'd use XMediaRecode (free, open source) to convert flv and a downloader extension to get them from streaming sites (cannot mention them). just please don't reupload them without editing. Best of luck!