You are not going to see me try to talk you out of it!
I agree with templemaners on the sub. The SVS PB-12 PLUS is already high-end and highly respected by everyone. So I think the only thing here as far as subs is to add another PB-12 PLUS.
Unless you feel like matching aesthetics with your new speakers. In that case I'd get dual custom Funk 18.0 TSAD18v1 NON-powered subs (add a Crown XLS2500 amp for $550).
Any day now, I'm expecting my new dual Funk 18.0 subs to arrive. They will match the aesthetics of my Salon2 (reddish mahogany color). They cost me $4190 delivered. Nathan gave me free magnetic grilles with them. They will also have the light gloss finish (not quite as shiny as piano finish).
I would still put most of that very juicy $25K budget to reference speakers like $12K/pr for KEF 207/2 Front Left/ Right and like $2K for the KEF 202/2c Center. Add some
KEF in-ceiling speakers.
Hi-fi Speakers - Reference Series - Overview - KEF United States
I would spend about $2K on a nice ultra-bright (best picture calibrated mode) & beautiful projector, like the
BenQ W7000 for $2,200 delivered.
For a little better PQ, but sacrificing a lot of the post-calibrated brightness of the W7000, the
JVC DLA-X30 3D LCOS projector is about $3,000.
JVC DLA-X30 3D LCOS Projector | Home Theater
I think the JVC commands a lot more respect and a little better PQ. But it also commands more money (which is worth it to many). However, the W7000 is twice as bright as even the $10,000 JVC (both in best PQ calibrated mode).
Add a nice PJ screen for another $500-$1,000.
After watching movies on my 120" widescreen, my 73" TV seems small. No going back for me. Size does matter here.
Anyway, just some thoughts from me. I'm sure everyone will certainly have some great ideas for $25,000.
Always a great discussion.