A download manager is a better way to increase your chances of a clean download. Bittorrent only works if you have lots of people downloading at the same time (or at least similar enough times that the people that have finished haven't given up seeding) - I'm not sure that's the case with Wikipedia DB dumps.
If the bandwidth isn't a problem, then you can use web seed[1] to back the torrent up when there aren't enough regular seeders. surely, bittorrent is the safest way to get uncorrupted downloads.