I like GK's cabs as well. I used to have their NEO 2X12. It was a good cab. I think I will try a signal splitter first. I think I will run one head through the 1x18 with a focus on low end frequencies and then run the other head through the 2x15 with horn and ported 12 with horn. I will see how I like it. It would be a lot of cabs to haul around if/when gigging ever resumes, but IMO, if the tone it provides is unique enough to the overall bass experience, then it will be worth it.
Anybody have a top notch signal splitter they recommend?