Yeah, I definitely see the niche. I just think it might be a little narrower than you.Any neck-pup-playing 5-stringer has a strong case for the Acme (or a pair of them) for sure.
I'm very interested in seeing how this cab performs with my 5 string P on the gig. That is a very 'meaty' sounding instrument, and I'm really digging it with the Acme in the house at the moment (with a bit of top end rolled off by the VLE on the Markbass head).
We shall see. The Thunderchild is literally perfect with my J's for small and moderate gigs. It sounds good with the P also, but that extra low end extension, and the bit more roughness in the upper mids of the Acme has me smiling with the P!
Fun discussion!