1. THE INVADER HELLL YEARRGGHHHH!!!!!!
2. the INVADER!!!!!
3. um... INVADER!!!!
4. some other lame ass pickup?
The reasons why invader is the best pickup for metal/hard rock.
1. James Hetfield used it for the Master sound(need i say more?!?)
2. The invader has the most solid and heavy sound of any pickups that i've heard. This is due to the fact that it's mostly lower mid range oriented thus making the high and low distortion elements less emphasized when overdriven. This makes the bass heavy and upper mid range fast and tight. Amp is driven hardest in the lower mid range region and thus does not sound boomy or muddy, ever! Even if upper mid range is cut down, the amp will not sound thin due to the huge push in lower mid range region.
----------------------------------WARNING!!!! ULTRA-VIOLENCE---------------------------------------------------
-Ok, but what if I do not cut down upper mids and use drop/lower than usual tunings? -Well the pickup will rip your head off, and not in a clean and tidy fashion; think of chainsaw with rusty chain, think of cable around neck and attached to the rear of a car, think of neck smashed with sledge hammer, think anything blunt and heavy used for cutting.