Wow! really sad to see the tracker go. Been using this site for 12 years. Thanks to Haku for all your hard work!! Ganbatte!
wrt alternatives, honestly JPS is the closest match, in that they host music oriented torrents and have good users and a good interface that allows for filters to find stuff.
Nyaa is nice and open, but it's filter and search leaves much to be desired
most other listing sites are too general and stuff we're interested in gets drowned out too easily