doesn't the presonus have a power supply of its own as an option?
if not, I saw powered 6pin pcmcia cards in greenhills that go for around the same price since they aren't normally powered esp PC ports.
The Firebox comes with a power adapter and can be bus powered.
@balta - check if the card has power passthru. Not all 6-pin cards support that. In any event, you might want to use the power adaptor instead because of the battery drain the Firebox will impose on your laptop.
The MOTU Ultralite is beginning to look very appealing to me because I just found out that the newer MOTU models now come with AKM converters, the same ones found in PT hardware.