I'm currently running the official (raw) BitTorrent (3.4.1 I think) and actually been running it for awhile now. But I hate it when I'm down/up-loading multiple files simultaneously because of all the open windows. I never tried other clients (except for the experimental one but I moved to a different system and never thought of installing it again). But I now I want to try one of those client that let me run multiple torrent within the same window. Is there a particular one that is highly recommended?

Thanks for your time.