I got a Gibson SG and I'm looking into changing pickups.

The problem is I know close to nothing about pickups. Well, in fact I know NOTHING about pickups.

What I can say is that I got a double beige pickup close to the bridge and a single black one close to the fretboard.

Now the problem I got is that the double one is too high and I can't push it down. It got some metal brakets under it and the body of the SG is really not deep enough. It gives me too much bass in my sound.

I play mostly metal but I would like to be able to have a good clean sound too.

What is the best pickup I should buy. I intend to change both I have. This is a 1967 and let's just say it got some milage on it.

Anybody can help me out?