Actually my singer just bought a bass and amp on Friday.

. Both of us are going to doing a side project while our guitarist is filling in on bass for a local band called American Gothic. We're going to be going in a Post Metal direction for it ala Isis, Wolves In The Throne Room. I've never been in a band like that so it's going to be fun.
That is why I want to do Dogman, it's one of King's X best known, heaviest, catchiest songs. Although all of our songs are either in D or E. To me, it would be worth downtuning one song for it. Goldilox would be amazing. It's sad that Dug won't sing it anymore *has the crowd participate for it from now on* but it's always been one of my favorites.
Our guitarist does backups and I've been toying with the idea of singing as well. I mean if Mike Portnoy can play what he does and sing, I have no excuse. Our bassist refuses to sing, which is ok with us, But alas that is what I'm afraid of is vocal harmonies. I want the cover to be as good, if not better then the original, nowhere near worse.
That is actually our plan is to but a cover as the 2nd to last song and finish with our song Souls Of The Damned *it's the perfect closer for us*.
One song that our guitarist is really gung ho about playing is For Whom The Bell Tolls because of how easy it is *sans bass*. But I feel if we cover Metallica, I wanna cover a badass song that will get people going.
I guess that's the other thing I'm really looking for in a cover, I don't want to do the top hit from a band, I'd rather do a lesser known song that people will discover because of us then want to go check out the original.