The best replacement for qbittorrent is utorrent.

The best alternatives to qbittorrent are rated as following:
★★★★★  utorrent
★★★★★  deluge
★★★★  transmission
★★★  vuze
★★★  tixati
★★  rtorrent
★  ktorrent
★  bitcomet
★  bitlord

Your alternative for qbittorrent is not listed? Suggest!
Speaking about qbittorrent, one probably shouldn't forget about magnet links.

Other search terms related to qbittorrent and their ratings are:
★★★★★ magnet links
You have in mind a companion for qbittorrent and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of qbittorrent in all years. Click on graph for more.
qbittorrent
utorrent
deluge