Driver advice - creating a new system

Just getting back into Loudspeaker design, took a 20 year break! Have not kept up on drivers so any help would be appreciated. Going open baffle, 15" woofers above and below the midrange / tweeter. I for sure want to use an AMT tweeter most likely a Mundorf, I currently have a Focal W cone midbass, really like the sound of the W cones. in order to preserve vertical dispersion, I want to stay with as short an AMT as possible but I need a crossover point of not more than 2KHz . The AMT does not have to be a dipole but I'm open to it. For a few reasons, I would like to go with a single 6.5" midbass. Efficiency of the drivers is not important,

Questions: are there better AMT's than the Mundorf? If I go with a Mundorf, what model are people recommending? there are a few.

Knowing that I like the sound of the W cones, are there any other midbass I should try? soft core with a rigid skin seem to work for me.

If you are not familiar with the Focal W cone, very clean and articulate but remain natural sounding.

And for you OG designers, just got LEAP 4 and LMS back up and running, a beautiful site, working on LEAP 5 as well.

I know that these are broad questions but please humor me! also happy to share my overall design if anyone is interested.

Geoffrey