On filters Im between:
Chromatron
Grease juicer
Or triungulo barbanera
Those are all solid choices, hopefully Spencer starts making more Chromatrons soon!
One filter I feel like a lot of people are sleeping on the Rossie filter by GFI System. It has 2 presets, is expression controllable, can do LPF, HPF, BPF and peaking filter, and has 3 modes, envelope, manual (with expression pedal) and stepped filter, so you can set the cutoff frequency in steps like a sequencer, giving an arpeggiated feel.
If you're considering trying out a Darkglass drive I would recommend the Vintage Deluxe. Its similar to your Vulcan XL in it's ability to act as a preamp, and is less modern and clanky than the B7K. It can still be made to sound brighter, but it's wheelhouse is the thicker, beefier overdrive sounds.
The Alpha Omega is also an interesting one, a lot of people use it for high gain sounds, but it's capable of some really beefy and smooth low gain stuff as well. Like the Vulcan, it has two separate drive circuits, but you can blend between them, instead of selecting on or the other. Of the Darkglass offering, the Alpha OImega is the most amp-like in terms of it's breakup and touch response, especially at lower gain settings./
Not to go too far off topic here. I'd love to see Spencer come back with an updated Pwnzor, and honestly, further to my previous comp suggestions, if you are looking for a tone sweetening comp, I think you would be very pleased if you could track down a Pwnzor. A little hard to find, but its really a great comp.