Scott,
I use the M-Audio Audiophile 2496 USB with a laptop.
Although the latency is very low even when recording whilst listening to playback at the highest rate I am a little unhappy with the quality of the result. The overall impression is of a compressed sound that is very slightly distorted!
This may be just me but I have tried everything to improve the quality even upgrading cables and getting the latest ASIO2 drivers.
Unless you only have a laptop I wouldn't use outboard again - I would get a PCI card instead.
Regards - Keith
[This message has been edited by KFingers (edited 05-20-2005).]