Jerry, I think the best sounding box, and the easiest to get discs for,
is a short-bedplate, double-comb Regina.  The 15.5" size is the most
popular and sounds so good that frankly most of the other makes sound
dull by comparison.  I joke that my 15" Reginaphone has saved me a lot
of money in the long run.  :-)

Best of all, a 15" model costs more like $5000 or $6000.  For the money
you're talking about, you can get larger Reginas that will sound
somewhat better (and the discs play longer) than a 15".  But if I had
your money, I would get a 15" Regina changer.

That way you can keep your 12 favorite discs and play through them as on
a cylinder music box.  And swap the mix from time to time.  15" changers
are just about $20K these days.

My second choice for a large box would be a Stella or a Mira, but most
of the musical arrangements are not as good as Regina's.  These also
have double combs, which make a big difference in tone quality via
"sublime harmonie."

If you want bells, Polyphon may be the way to go.

Hope this helps

Mike Knudsen