I advise you not to go for a crawler. It's a versatile pickup, able to play some heavy metal, but it will be too warm and rounded in that guitar for Metallica stuff, and far not enough tight, agressive and sharp for some Megadeth riffage.
The Nailbomb is said to be great for the Modern 'deth tone (since youthanasia). But once again I'm not sure it will pair well with that huge slice of mahogany you have as a guitar ! But it will be the best Alnico choice, I think.
If you are not against Ceramic, then it might be a better option for you... :guitar4:
Imo, the CS combo will fit you just fine : tight and very clear sound, with a great versality to play some great cleans. I am expecting him to give a spectacular result in this guitar and a great cuttin' sound with enough chunk. You'll nail both Megadeth and Metallica with it thanks to it's even EQ that doesn't color the natural sound of your guitar..
BUT For a fuller sound with more power AND tightness you can go with either a Painkiller or a Miracle Man, still with a CS neck. :twisted: :twisted:
The upper mid cut / tightness / clarity of the Painkiller IS the countdown / RIP sounds, whereas the low mids push of the MM will be more in the Metallica / modern Deth sound, but less versatile than the PK and of course the CS.....
so many options...... :good: