I remember the SWA videos done for earlier versions of SONAR, I really could not bear listening to that accent of the guy who did them for long, though the narrator was knowledgable. Karl Rose is a significant improvement over that guys accent, yet still has a foreign accent that make it not as comfortable as listening to a non-foreign accent, for me. And some days, listening to a foreign accent for long periods of time is no problem.
 
I guess one can get weary of a certain voice, so it's good to have different choices made available.
 
Still, me being American and used to North American accent voices, I don't think I could ever grow weary of a North American accent voice such as Eli's or Craig Anderton's, or Bill Edstrom's. I mean, I went through college with lot's of lectures and never grew tired of hearing a North American accent voice, though some of the lectures were boring, I can listen for hours at a time and for days, and feel right at home with it. But I can grow tired of hearing a voice with a non North American accent to where it impairs my learning from the source video/tutorial.
 
Yet, I reckon to suite the most users, providing tutorials/videos done by a variety of narrators with various approaches to how to do things is the best approach. And the value of reading material for learning purposes becomes apparent in this situation. I do prefer video for learning DAW software related stuff, though.

Scoot
 Kenny Gioia's New York accent made a nice break. 
 
Personally I think the Bakers should get Christopher Walken in to do some.

LOL about the Christopher Walken mention!
 
The accent that native New Yorkers have an which Christopher Walken has, we call an East Coast accent or New England accent. I like that East Coast accent, myself, though I'm from a North Central state, Indiana.

There is so much info on the groove 3 site that it's quite overwhelming at first glance. During the first month when I had full access, I skimmed across so many titles to see what was available. That month passed very quickly. Since then I've been buying one or 2 per week, based on my needs and what I remembered as good videos. When you buy them outright, you can watch them several times over the couse of a year or so just to ingest all of the info that is revealed to you. I watch them over and over. Even more than reruns of the "simpsons" and that speaks volumes in itself. Its just so nice to have them available when you hit a place in mixing and you don't remember how something is done. Just start the video, jump to the place you need, and the info is all there for you.