With those constraints, I would look for a 2nd hand pair of Marten Coltrane Alto's. They are large 3-way stand mount speakers which have a 9" down-firing Accuton woofer, 5" Accuton midrange & 1" Accuton tweeter. The Alto's have a beautiful elyptical-shaped carbon sandwich construction monocoque cabinet which lends marvelous purity to the sound. The are not the most efficient speakers (87db, 6 ohm). My Alto's struggled with a Classe Cap-2100 integrated, but really sang paired with a Boulder 1060 & Ayon tube linestage. The great thing about these speakers is they were designed to be placed close to rear, and relatively close to side walls thanks to their tuned down-firing port which are innovate my ported through the insulated polished SS stands, thus not disrupting the bass output. The curved carbon sandwich construction cabinets also help minimize room issues.
The Alto's are WAY underrated due to their short production run. Owner and Chief Designer of Marten told me the Alto's were very expensive to manufacture & they weren't making money on them. Also apparently buyers didn't like their look, so Dealers had trouble selling them (I think they're gorgeous). As a result, 2nd hand prices are soft & those who own them tend to keep them and enjoy them, rather than lose money. Thus these speakers rarely appear on the 2nd hand market. None the less, if put up a 'wanted' ad, you might attract some interest as generally genuine and motivated buyers are not bottom feeders.
Here is a link to the 6 moons review.
The Alto's are WAY underrated due to their short production run. Owner and Chief Designer of Marten told me the Alto's were very expensive to manufacture & they weren't making money on them. Also apparently buyers didn't like their look, so Dealers had trouble selling them (I think they're gorgeous). As a result, 2nd hand prices are soft & those who own them tend to keep them and enjoy them, rather than lose money. Thus these speakers rarely appear on the 2nd hand market. None the less, if put up a 'wanted' ad, you might attract some interest as generally genuine and motivated buyers are not bottom feeders.
Here is a link to the 6 moons review.