$500 to $1,000: Steinberg

Steinberg UR-RT4 USB 2.0 Audio Interface w/4 Rupert Neve Transformers Quick View
Steinberg UR-RT4 USB 2.0 Audio Interface w/4 Rupert Neve Transformers $599.99
Steinberg UR824 Rackmount USB Audio Interface Quick View
Steinberg UR824 Rackmount USB Audio Interface $799.99