Before I used Azureus for downloading only stuffs with Japanese names but the problem was the memory consumption....
Now I use Bitcomet 0.70 + Bittornado 0.3.7
Bitcomet for stuffs with Japanese names, Bittornado for Anime, mp3, etc...
I remember I read on a forum Bitcomet 0.70 version is the best (dunno for which reasons). I didn't change my version (now there's 0.85 version). If you check all Bitcomet users, they often use 0.70.
5-6 months ago, I tried to update Bittornado but the installer contained a trojan (kaspersky told me there's a trojan) then I re-installed 0.3.7. Now, dunno if lastest version are safe or not...