I use a MM-bridge in one LP, and it's GREAT for metal.
The MM have high output, but still remains clear and focused.
It has a smooth roundness to it without beeing too dark.
It has NO fizziness or spiky harsh top-end, like many other ceramic pickups do have.
It might be a bit too much for bluesy stuff, but for rock and metal? Killer!
T.
www.trendkillerweb.com