English dubs for Italian films usually are done pretty well considering the main actors are American a lot of the time. :] Although supposedly the Italian dubs are overall superior. I just choose not to watch them...like in the case with the "Man with No Name" trilogy, I can't imagine Clint Eastwood's characters being voiced by anyone other than Clint.
I do wish, however, that Anchor Bay would also supply the Italian language tracks on their DVDs. All of Dario Argento and Michele Soavi's films are A-OK in English, but it would be nifty to have the Italian dubs too. In the case of Deep Red, however, it's great that they included the full Italian dub, considering not all of the English dub had been recorded due to cuts to the film's US release. Otherwise, if you watch it in English, it's so jarring when suddenly for certain scenes the voices change and they're speaking a different language.
I wonder if the Blue Underground releases of all those movies contain the Italian voice tracks.
By the way, I really need to see more Lucio Fulci movies. I've only seen Zombie/Zombi 2 (and, if it counts, that horrible atrocity known as Zombi 3). I don't think it's nearly as great as a lot of people I know claim it to be, but it is entertaining. Really gotta see The Beyond one of these days.