As much as I love my Vandy 3A Sig's (with a pair of 2Wq subs), and as much as I'd like to recommend the 3A Sig's to you, I think the advice already offered is probably correct. My room is 13' x 18', and I think it is about as small as I'd recommend with the 3A Sig's. My speakers are about 30" from the rear wall, and about 3.5 feet from each side wall, with my seating distance about 10' from the speakers, and they perform pretty well in this arrangement. Previously, however, my listening room was about 16' x 25', and that really gave the 3A Sig's the breathing room they needed.
I'm not sure that the 2CE's will be much of an improvement from a space perspective, and their tonal balance is a bit darker and warmer than the 3A Sig's. I also doubt that the new Quatro will work very well in your room.
Given the very high quality of the rest of your system, and the size of your room, my advice is to look for a really good stand-mounted monitor-type speaker (such as the Focal/JM Labs 906) and add a good subwoofer.
I'm not sure that the 2CE's will be much of an improvement from a space perspective, and their tonal balance is a bit darker and warmer than the 3A Sig's. I also doubt that the new Quatro will work very well in your room.
Given the very high quality of the rest of your system, and the size of your room, my advice is to look for a really good stand-mounted monitor-type speaker (such as the Focal/JM Labs 906) and add a good subwoofer.