Well Nailbombs are aggressive, whilst Holy Divers are smooth. I love the description of the Nailbomb, but for some reason, when I listen to it I always get a 90s thrash sort of vibe from them which puts me off. I was after the same sort of sound as you, and I decided on the Rebel Yells. I was interested in the Holy Diver, but I found the Rebel Yell seemed to possess the qualities I love from my Duncan JB, more. Check the Rebel Yells out. It does the Hard Rock sound very well, and it's tight enough for metal. Red Seas Fire's album was recorded with a Rebel Yell/VHII combo, if you want to check that out.
For your neck pickup, it really depends on the bridge you pick, and what you're exactly after tone wise