The CEC TL-51X is a great deal at around $800 used. The Northstar 192 is also very good. I've had both in my system and could live happily with either of them. I only use the CEC TL-51X now because it is slaved to my Lessloss DAC.
Perhaps a 47 Labs Shigaraki would be an option as well.
Perhaps a 47 Labs Shigaraki would be an option as well.