What is the best speaker for a smallish room?

Thanks for all your advice. I ended up buying a pair of Reference 3a Di Capo i (although I also liked Thiel 2.3). I was intrigued by the absence of crossover. I will not sell my Quads though...will keep you posted on how the sound. The reviews I have read are quite promising.

Thanks for the suggestions. I was also thinking about Thiel 2.4. They are not too small, but should be ok in a room like mine, don't you think?

yes, it's not a problem to put bass traps, although one of the two corners behind the speakers is not really a corner. The rear and right walls do not intersect at a 90 degree angle: each intersects at a 45 degree angle with a short wall segment (30 inches)

The Manger Swings look like a very interesting speaker. I did not know it, thanks for the suggestion. They remind me of the Reference 3a Veena, which is a speaker I am considering, together with the Thiel 2.3.

More genereally, two or three people sent me private messages recommending Reference 3a for a small room, particularly the MM Di Capo. I have looked at the specs, and the absence of a crossover is an intriguing notion. I may give it a try, although both Thiels and this Manger Swings are tempting.

So, I have been using my Reference 3a Di Capo i with my EAR 890 and Klyne preamp. This is a very good speaker, definitely recommended. It doesn't quite match the sophistication of my ESL 57, but they are growing on me. They like tubes, and my Klyne preamp might not be the best fit -- they are just a tiny bit too detailed with some recordings, and if a recording is bad, they definitely don't help it.