From my opinion, "qbittorrent
" is the best.
Cause, first of all it's free & doen't have any popup ad's.
It's more flexible then other torrent downloaders.
It has a simple interface & it doesn't needs you to have extra afford.
So, ya my choice goes to "qbittorrent
I gave the download link below. I think you guys should try it. It won't disappoint you. https://www.qbittorrent.org/