Definitely take the time to listen to the Unos...if properly set up and driven, they will do things that no Quad (excellent though they may be) could ever dream of. If you listen to a lot of RnR, electric blues, etc. which benefit from immediacy & macrodynamics, you will likely prefer the Unos.
Either way, you'll have added a vital chapter to your audio journey.
Either way, you'll have added a vital chapter to your audio journey.