What guitars are better? Fender Stratocasters or Gibson Les Pauls. Your choice!!!

by the way for heavy metal not for like rock or crap like that?

Firstly, there are other kinds of music than heavy metal, and just because you don't like them doesn't make them crap.

Secondly, either a strat or a les pail can be used, as long as the strat has a humbucker in the bridge position, it will be ferfectly up to the job.
Works for Iron maiden anyway.