I loved how little CPU uTorrent absorbed, but I found the rest of my network suffered for it. Multiplayer on the PS3, Wii and X360 was stuttery; websites took longer to load, on other machines and especially on the torrenting machine.
I've now moved to bittorrent. It uses a fair bit more CPU power, but I've got some to spare on this rig, and doesn't punish my network anywhere near as much. In fact I don't even notice the difference in multiplayer, between torrenting and not, whereas with uTorrent it was barely playable.
I expect that will be more down to the default settings for each client, than the client itself.
Another vote for uTorrent, tried loads and found it the best.


