Going through a catalog last night, I came up with a couple of additional options that you might want to look into:
Aardvark USB3
Edirol UA1X (this seems like the best option, to me)
Edirol UA1D
UA3FX
Edirol UA5
The UA1X sells for under $80, and is a 16-bit/44.1 kHz USB audio interface with stereo RCA I/O as well as digital SPDIF output (and a headphone minijack). The UA3FX and UA5 seem to offer better A/D-D/A converters, but might also incorporate features that you don't need.
And the more I look into it, the M-Audio Audiophile USB does look like a very nice unit, though again, it is packaging some features that you don't really need (though not to the same extent as the MBox).
Good luck, Tom.
Aardvark USB3
Edirol UA1X (this seems like the best option, to me)
Edirol UA1D
UA3FX
Edirol UA5
The UA1X sells for under $80, and is a 16-bit/44.1 kHz USB audio interface with stereo RCA I/O as well as digital SPDIF output (and a headphone minijack). The UA3FX and UA5 seem to offer better A/D-D/A converters, but might also incorporate features that you don't need.
And the more I look into it, the M-Audio Audiophile USB does look like a very nice unit, though again, it is packaging some features that you don't really need (though not to the same extent as the MBox).
Good luck, Tom.

