I can't really suggest anything without more details as to what you want in the pickup. For example, I know a couple people here highly recommend the DiMarzio X2N and it would be a great metal pickup, but you might not like using something that hot or with that tonal balance.
"If one has realized a truth, that truth is valueless so long as there is lacking the indomitable will to turn this realization into action!"
-A.H.