You should also consider the B&K reference 30. This is the one I ended up getting. I listened to the B&K vs the Sunfire (for two-channel mostly) and picked the B&K. I haven't directly tested the Bryston or the Classe side-by-side with these, but I did listen to them and neither of them blew me away.
I use the B&K for D to A as well, though, so this was my priority. If you are just using it as passthrough, the Bryston or Classe might be better bets.
If you can, make sure to listen to them _in_your_setup_. The amp you match with it will especially make a difference.
John