mixers
The Yahama DMP-7 and DMP-11 input analog line level signals and process in
the digital domain. They are quite pricey, although not quite as expensive
as your guess. The DMP-7 has motorized faders that can be remotely
controlled via MIDI. The DMP-11 is a rack-mount version w/o the motorized
faders. It's been a while since I looked at them, but I think that
they're in the $2-5K range.