Looking for a dealer in Chicagoland to audition the Quad S2, also interested in the Sierra 2 EX. Latter is about the top of my limited budget. Anyone have an opportunity to compare both, with their proprietary ribbon tweeters? My room is roughly 18 x 16, I don't mind a touch bright, currently running a 60 watt Rotel integrated, possible upgrade coming on that as well, though it has served me very well up until now. Low to a moderate listening volume. I value (what I consider) purity of timbre, fairly wide soundstage, clear and unmuffled high end. Appreciate any and all thoughts.