Hmmm that's a good question. Well it's tough I have seen a couple anime's with dubs that are good. Though I will say it's quite rare for me to like. When they're done right I think they're wonderful. But if they don't do a good job then it's just unwatchable. So overall I'd say it's safe to say that subtitles are the way to go. I don't mind reading what's said, plus the voices always fit better than the dubbed ones. So for me I'd go with subtitles.