The warm, lower gain tones are achieved by rolling back the volume pot. The nice clean tones with the Juggerset as a whole means that the amp transitions into clip in a really lovely way.
I think reviews will only take you so far and that eventually you need to simply try something and see if it works for you. With the 10 day return / exchange policy, BKP has you and your tone covered so there is really little risk involved.
I mean the Nailbomb set is also great but it is brash, hairy, articulate, throaty, ill tempered, and covered in tattoos. Good fun!
The Juggernauts are powerful, aggressive, but also refined, smooth, and cultivated. And yeah, the neck pickup is close to the VHII so it isn't super compressed.
The Holy Diver may be another option but we're talking more of an 80s hot rodded humbucker sound. I love the Rebel Yell bridge pickup and the VHII neck but we're really talking classic rock, blues, 80s rock, hair metal, 80s metal, hard rock punk rock territory. I still think that the Juggernaut set is the best option and that you need to experiment with the pickup selector, amp settings, volume pot, tone pot, and try to see what you can get the pickups to do. So many people just select either the bridge or neck pickup and just run the pickups on 10. The volume and tone pots are there for a reason. Just some ideas of things to try.
At the end of the day you will just have to try something and it may be awesome or you may need to try something else. I personally believe the Juggernauts are some of the best pickups I have ever tried which is why I rave about them so much. Brian Tataryn, a guitar tech from WPG, Canada, also loves them and he's into a lot of older music such as classic rock.
I hope this helps.