I don't buy anime DVDs, or any TV series DVDs, simply because they rape you for your money. I'm not paying $5 a episode for a 200+ episode series.
Also, Viz probably did not screw up Ranma. They only did the soundtrack and licensing. Ocean Group did the ADR production, and given their track record for fucking up dubs sometimes, I wouldn't doubt that they did the same here. (Ocean Group isn't actually listed as the Adaptation on
ANN's record, but most of their voice cast appears to be from the Ocean Group.)
Ocean Group is really really hit-and-miss (hey, look at Gundam Wing), but fortunately, they aren't involved with Naruto. Unforunately, ShoPro/Viz (they have merged) haven't really picked a dubbing group, and since both Viz and ShoPro have picked OG a few times, there is a chance that they may pick them again.
Naruto seems to be one of their few major titles that they've picked up. The only others I've seen are Hamtaro, Inuyusha, Zatch Bell, and Ranma. Viz does a shitload of manga, but only a few TV shows on their belt. I hope to fucking god that they pick somebody like Animaze/ZRO Limit or New Generation. On the chance that they pick OG or themselves (they've done Inuyusha themselves with mixed results), I've give them a 50/50 chance of pulling it off.
Popularity doesn't seem to encourage picking good dub groups, but American dubbing seems to have gotten better over the past few years. Kenshin was actually dubbed by a fucking Asian company (Animax South Asia, the same company that brought you .Hack's crappying dubbing). FUNimation actually fired OG for their dubbing of the first season of DBZ to do their own, and if FUNimation's dubbing of FMA is any indictation, they may be becoming an excellent force in the dubbing world. (Unfortunately, FUNimation only dubs their own stuff, so no chance for them in Naruto.)
In any case, this is all speculation, and we don't know who is going to be dubbing for Naruto. All we know is that somebody has picked it up, and we can only go by their track record on who is going to actually do the dubbing. Fortunately, we have avoided the worst case scenario. (A few WCSs, actually. I could watch a OG dub without too much cringing, but I can't stand a full episdoe of Kenshin's dub.)