Haha you know my opinions on wood tones in an electric guitar so we won't go there although the MN guitar I made had a mahogany body ad ash neck and it had a more beefy classic rock tone, it had nice mids and ok highs and it handled bass tones well however they weren't very really the bass tone I like, I think it would suit your style better than it did mine but that's how I think yours will sound, the neck being mahogany will probably give you more bass response though than the ash neck I had.
Hmm about Butternut, it's a really soft hardwood, you can scratch it with your nail almost as easy as cedar which I am sure you already know. I think it may bring the sustain down a bit being so soft but yes it looks unique. It kind of reminds me of the old fake wood paneling you see in some old houses.
What happened to those oak fretboards you had? If you have red oak you should use that, it barely changes in our winters up here and should you ever make an acoustic red oak makes good sides and back. Red oak also looks pretty cool. Other than that use some walnut or something if you have it. (When are you coming to get that walnut FB for your seven string or did you get one made now?
What kind of finish are you going to do?
Get some Seymour Duncan Blackouts, those sound great I think.