Maybe Steve was kind with his assessment of your need of a tuner, but I need to point something, the DNA 500 is a world class amp and needing to compromise a source and line amplification, will simply steal from its real potential.
Sunfire preamplifiers, with tuners and the like, will be a compromise.
Say that you need a tuner to pair with the amplifier, that you do not have space, it is understandable, but try to get the best preamplifier out there and compromise the tuner section with a separate tuner.
A nice alternative to the Sunfire would be the older Anthem AV-20? That was all the rage about 3 years ago. I think affordable and very transparent, according to reviews out there.
Another very good brand that has a tuner module built in is Linn.
Oh, I remember that there is a new Mcintosh C-43 or c-45, that has a tuner module built in in it. I think Spacekadet...member here in Audiogon has it on his system.
Adcom, do not even come close to what these other companies can offer soundwise.