Avantgarde sounds very good too but their presentation is very different than QUADs. Horn speakers are very details and it will expose any weakness from your equipment so you must use very good equipments in the whole signal chain. By the way, horn speakers does not produce as much depth in terms of sound stage as other speakers, including ESL. You really should audition the Avantgarde before you spend the money. The good thing is that Avantgarde and QUAD hold their value very well so you can take some risk, just more work to pack and ship the pair if you end up not liking the sound.