Any small speakers equal in sound to Hales Rev III

System matching is everything when it comes to gear ultimately. I could easily see a tube(on top)/Solid state(on the bottom) biamp scenario that would, IMO, sound better than what the Hales Rev III's sound like...to my ears. The Rev III's might have a bit more res of detail(just a tick), but I like the transparancy and neutrality of timber from the 2.9 NHT's! Also, the Bass is tighter. The 2.9's top end is perfect with tubes, and solid state for bass bottom if you want to get tricky. If you don't want this involving, then the Thiel 2.3 or Hals Trans 3's or smaller would work better.
Good luck

I think you'll find speakers like PSB Stratus Silvers or better NHT 2.9's to be much similar performing to the Hales Rev III's, and maybe a bit better!?
If you want to move up in refinment and resolution, you could go to small Thiel 1.5's used (800-$1200/pr used) if you want to stay in the $2100 new price range (but used obviously..yes?). How big is your room, and what kind of music however? You may require something that's more "BALLSY", so it depends.
I think, all around, you would do better with NHT 2.9's used. They'll even step up your sound a bit, and downsize your speaker size in the process! They do rock to classical great at that price range.