I think both have their advantages and disadvantages. But like mbucari1 said, if you have nothing in mind and you want to watch something torrents are great although some of the RS blogs I frequent have a lot of stuff on display so that could work as well. But yeah, i frequent torrent trackers more than RS blogs, except ofcourse release-log which is an everyday thing.
Some good RS blogs are rslinks and rapidshareking, both get some pretty rare stuff.
Bookmarks