What speakers do you own now? I'm not quite clear on that. I own a pair of Monitor Audi S1's which are an older version of the RS1's and they are anything but airy and detailed. I would look at dynaudio or B&W's. I'm not a fan or Triangles. My friend has a pair of Triangle towers that he paid $3k for and he is trying to sell for about $1250pr. They are detailed, crisp but need a sub as bass is very tight and fast but weak. They are exceptionally bright even with an ARC tube preamp, Belle's amp and a warm sounding Marantz 8001 SACD player.

I would consider Magnepan MMG's, MG12's, PSB and Paradigm speakers as well. For that airy sound you may want to save your money for a tube preamp or amp.