Hay Matt have you checked out the Edirol UA-25, I think it has everything you need
"Edirol UA-25 USB Audio and MIDI Interface at a Glance:
* Stereo audio interface with phantom-powered mic/line preamps and S/PDIF digital I/O
* Includes +4dBu balanced outputs for pro connections
* Zero latency direct monitoring
* Built-in analog compressor for clip-free field recording
* Completely portable: rugged, USB powered, never needs a wall socket
Premium quality stereo audio interface
The UA-25 uses powerful analog electronics coupled with well-matched A/D & D/A converters for superior audio fidelity. You'll find a wide range of inputs and outputs in a compact case - a pair of Neutrix XLR/TRS combo jacks with phantom power, a Hi-Z port for guitar direct connection and 24-bit/96kHz S/P DIF optical I/O ports. The UA-25 also features a pair of high quality microphone preamps using premium analog components. It provides a clean recording environment to give you crystal-clear recording.
http://www.sweetwater.com/store/detail/UA25/