That's about it. Most multi-sync monitors can't handle that resolution without major software hackage. (And I'm not sure such hackage is even possible on the Mac OS.)
if you can find drivers for it i dont see why any kind of monitor cant do it, i can force my ENViSION monitor up to as high as 1900x1080x32@60 and down to as low as 320x280x32@220 useing my ATi Catalyst control panel.