Let's try this a different way then


It appears my desired Maggies will not work in my 13x22x10 room, so I am now in search of the next best thing.

Which speakers (especially those listed on the marketplace here) under $1000 would be well matched to my Adcom GTP-500/GFA 555? Source is an Onix XCD-88 (Burr-Brown 1732 24-bit/96kHz DAC internal).

Musical tastes are folk, jazz, classical and 60s rock. As you can tell by the reference to the Maggies, soundstage and detail are more important than bass. Ideally, I'd like to fill the room with music and lose track of the speaker locations
kythyn
There's no reason smaller Maggies wouldn't work in your room, probably best along the long wall. 1.6s might be a good choice if that's your cup of tea.

IMHO, small point source monitors are best at disappairing and throwing a big soundstage. Consider Reference 3A, Proac, Totem, Focal

You can always add a sub later. Cheers,
Spencer
The new Magnepan MG.7s are stunning and would work well in that room. New they are only a little bit more than your budget.
First off, after owning MG12s and MG1.6s I can say I'm not a Maggie guy. While I can hear the virtues in them, they just don't convey the music to me in a way that lets me relax and feel it. Always find myself listening to the speakers/system in a technical way.
My last try was with the 1.6s and it didn't take long to realize they weren't my thang. I gave them to my grandson. While we were dismantling the Maggies, I had my Revel M20s playing the music I had just used to demo the 1.6s for the boys. Everyone agreed the Revels sounded better. Even my 84-year-old dad thought the Revels had more going on.
Under $1000 you need to look at used. I agree with Sbank above, except I'd through Revel and a few others in the mix.
There is a pair of Spendor S3/5 monitors listed here for $650. Put
those on a nice set of stands and I think you will like them. You
would even have some cash left over for a sub if you think you
need it! BTW, $650 is on the high side for those speakers.