Welcome to the BKP effect I guess. =) Good to hear things working out.
Handful of things: RY vs NB. The RY is somewhat of an underwound NB. This makes the RY a less hot, with a rocking screaming high mid spike, high end of overtones, and a lighter but very tight and punchy low end. Full on early 80s flavor (think Rattīs Round and Round) but able to handle modern metal no problem. Perfect in darker guitar to lighten them up. I always like to say a classic tone faithfully brought to modern times. The NB by comparison is more nasty, agressive. Full on 90s metal. If you listen the inspiring album you know what it was set out to do. More bottom end and hotter, yet can be dialed down too. Great choice for 90s and 00s metal and hard rock styles. Biggest complaint is the highend often being described as hairy. I recon this is often a clash with the amp.
Just as a curveball, if you are considering the NB, maybe look at the Stockholm. Not unsimilar, but the SH is more open, roaring, and plain raw in everything it does.
Either NB or SH pair well with the supermassive neck (tuned down Stockholm, touch brighter, less hot, and a noticable reduction in bass). Nantucket should be able to keep up no issue too, but will obviously have a more classic voicing.
Pairing a NB with a CS neck is also common. If using the Cbomb this is the modern Petrucci combo (classic Petrucci, ca. Awake era, would be HD bridge and AM neck).
The CS and AM have not remotely the same ceramic character. The CS is way more organic to the extend that people said that blind they would probably think alnico. The ceramic here is more used to create the light scoop that sits so well in LPs I recon, which is exact opposite from the middy AM.
Ok, that are my current thoughts. =)