My Les Paul uses the 498T and 490R set and I also like them, though ironically, if I were to change one of them, it would be the 490R, which can be a little disappointing. Anyway, some thoughts....
The 498T I find to be quite tight and easily handles as much gain as I need. I like its slightly less compressed feel and the aggressive edge it has going on. I've often thought about what to change it for in the BKP range but it sits between a few different pickups. The C-Bomb, due to the ceramic magnet, will give you a very different feel so if you want to retain the basic character of the guitar and have more versatility, I'd probably stick to alnico. The A-Bomb is certainly more aggressive, raw and hairy than the 498T, though I don't find the core tone that different. I can see a case for the A-Bomb but it depends if you want to move your guitar into a slightly more modern and aggressive area or not. I remember being surprised and just how aggressive and hairy the A-Bomb was, though that was in a different guitar and I've remained tempted to try it in a Les Paul.
The common suggestion to replace a 498T is a Rebel Yell, and I imagine that's what BKP would suggest to you. As a lighter wind it's brighter than the A-Bomb and probably a tad more versatile and as you said you found the Rebel Yell to lack versatility, this also makes me think twice about suggesting the A-Bomb to you. To me, the 498T sits between the A-Bomb and the Rebel Yell. It's hotter, darker and more aggressive than the Rebel Yell but not as hot, dark and aggressive as the A-Bomb.
This leaves a problem and it's one I've thought about a great deal. Kiichi often describes the Rebel Yell as a modern pickup with a very vintage feel and I can understand that because I'd describe the 498T in a similar way and I think that's why I like it. I loved the Crawler for the same reason as it occupied this wonderful area between vintage and modern. As you have also mentioned both vintage and modern and said that you like the 498T in terms of its basic tone, I assume you feel much the same about this as I do so if it was me, I'd look at the Black Dog. Where the Rebel Yell is a modern pickup with a very vintage feel, the Black Dog is a vintage pickup with a very modern feel. It has the AV magnet that I think would work for you and it has the lighter wind of a vintage pickup to give you some PAF tones but it's wound with modern polysol wire to give it a more modern feel. This basic approach works very well on the Holydiver neck model, which is remarkably PAF-like but retains the cut of a more modern pickup and is absolutely sublime. The Black Dog will give you a lot of vintage PAF character but be easily tight enough for Metal tones. It will give your guitar the body that is characteristic of a Les Paul Rock tone and quite a bit of versatility. If I was changing my 498T, I think I'd either be getting a Black Dog or having a custom wind made for me. For the neck, I'd either go with the calibrated set or use a Holydiver.
https://www.youtube.com/watch?v=CaqEET376-I