Well, I will give you my "personal" thoughts...
I also play melodic death metal, and I've tried the Nailbombs (alnico set), Miracle man (set) and also the Painkiller bridge...
For my personal tastes, the PK didnt work at all... was too trebly with many highs - middle/highs... I had a bad time on stage when I change guitars from one with the MM to the PK... the sound changed a lot, and I had to start tweaking the amp on the fly... (bad moment).
I really think the MM are a great pickups for the style, very powerfull and great palm mutes, and it cuts really cool, nice compression... BUT I even think the Nailbomb is way better for the style... Way more... "melo-death"... more In flames/soilwork/darkTranquillity/ArchEnemy... at least, more for what I'm searching and for my guitas/amp/music/hands/ears.
I personally keep the MM in one guitar, and NB in other 3 guitars... (I'm waiting for a NB ceramic which I will put on an ESP explorer, and I think it will be really cool and thicker and tighter, I'll let you know).
But I think you cant go wrong with MM or NB... (but NB is godsent for melodeath).
Good luck and let us know when you get them... ;)
P.S. if you want to buy a set, Id go with a matched set, Iwoulnt mix, the MM and NB works perfectly theirself ;).
(Again, this is my personal taste, no more, no less... I guess there would be people who are not agree but well, just my 2 cents)