The Quad's are great speakers. Had the 12L's for awhile with the Arcam AVR200. A very nice synergy. However, if you really want them to sing, add a 2 channel power amp for music playback. I have the Odyssey Audio Stratos w/ cap upgrade. Sells for 1150 USD and is a steal considering its performance. Really manhandles the Quads and opens up the soundstage. That said; when I heard a pair of Elac 203.2 bookshelf speakers from the same dealer I bought the Quad's from I couldn't help but upgrade to them. A fantastic speaker that outperforms the Quad sound hands down.
Enjoy the music regardless.