When you're buying equipment i think it's best to have a particular idea of what you're going to be playing with it, a few guitarist that i know through my guitar school who do fill ins for different bands have a few guitars, so they can be quite versatile, but i don't think that'd be your aim.

Pure Rock/Metal Guitar - i asume it's all gonna be hard rock, which means killer distortion, which means humbuckers, which means duel humbuckers, which means gibson style guitar.