Based on your description I strongly suggest you audition the Quatros as they will be a perfect fit for you. Once you've heard them compared with the other speakers you can make your own call. Let you ears do the buying!
Vandersteen, Coincident or Green Mountain
I've got Vandersteen 3A Signature speakers with two Vandersteen 2Wq subs and am happy with the sound I'm getting. But the 3A's are quite physically dominant in the room so I'm considering something smaller for that reason, as well as I'm curious what other speakers would sound like. Started out researching stand mounted speakers but I'm now looking at floor standers and the two I'm interested in are Coincident Super Eclipse III and the Green Mountain Pico Mideo. I've corresponded with both manufacturers and they both think the models of their speakers I'm interested in will sound better than what I have (what a surprise). I was quite impressed with Roy Johnson from Green Mountain as well as Israel Blume when talking to them. My amp is an Ayre V-5xe, preamp is Aesthetix Janus. The room is about 14 x 19. Just looking for comments which I will take with a grain of salt since the only way to tell is audition but in this case it's not possible.