If you don't need more than two inputs, how about the Shanling PH3000 headphone amp? Tube-based but wide bandwidth (spec'd out to 100KHz), with two line inputs and a pair of line outputs, 2 Neutrik headphone jacks, and an ALPS pot, all for $399.
I'm sorely tempted by this piece myself.
I'm sorely tempted by this piece myself.