Before you answer that question, please do not say "you can play metal with any bass." I realize that. That's why i'm not asking; "which bass is best for metal?"
I recently aquired a 6 string bass that I am playing and absolutely love it. It goes very well with the church praise team that I back up. The looks, tone, and aesthetics are really amazing and I am very happy with it.
I have just been asked to possibly join a metal band that a couple of guys I know will be starting. The singer/guitarist is utterly amazing. He knows his stuff and is a pleasure to work with. The drummer is also very good. He is getting a master's in music education and knows his stuff. He is very versatile!
The guys are wanting to play some classic metal i'm sure such as Ozzy and Sabbath, but our focus will be bands such as Killswitch Engage, maybe some Five Finger Death Punch type stuff.
I know Killswitch tunes to C. I was asked if I would play a 4 string and tune to C or play a 5?
I'm not sure about this because a lot of killswitch songs seem to be written with that open C note being pretty dominate.
So, I'm not sure if I should get a 4 and tune to C or play a 5 string (can you tune a 5 to C by tuning up) or just bring my six and rock that.
I can't think of any metal player other that John Myung that uses a 6 and I play nothing like him! He is far more technical than I am.