I have tried dozens of BT clients and found that the best to be BitSpirit cause I was able to get up to 1.5MB/s vs. 100KB/s (same torrent) on most of the other BT clients including BitComet, Azureus, Utorrent, BitLord, and whole lot more...The only problem I have found with BitSpirit is that some of the private torrent sites have banned it...the ones that have banned it I use Azureus.