Voted Other Here:
I use an RME Fireface, WOW! Before that I had used a Firepod, which is a great unit, and also a Tascam 1804, also a great unit, but I had some problems with the driver stability at times. RME has been amazing however in comparison, both with drivers and sound conversion.
BTW Amonte: I would go with a Firebox over the 410 probably. I think with the 410 you can only use 2 analog ins at once, and the Firebox you can use 4.