I have been using Azureus for my torrents for a while and I have had no problems. How ever µTorrent has replaced Azureus for me not only for all of it's features but its tiny, and my favorite thing in the whole world that I wish programmers would do more is you don't need to load it. µTorrent comes as just an exe which can be run in what ever folder you want. No invading Window's system folders.
Find µTorrent, here.