Audio Interfaces
Metric Halo:
Makers of very high quality Firewire Units, the 2882 and ULN 2 have an enviable reputation for reliability, flexibility and sound quality, and offer unique, latency free DSP power. Mac only
http://www.mhlabs.com/metric_halo/
RME: Makers of a wide range of high quality audio products - Firewire, PCI, PCIe, Cardbus based as well as devices utilizing MADI for larger systems and longer cable runs. Mac and PC
http://www.rme-audio.de/en_index.php
Apogee: Makers of a wide range of Audio products from the entry level mobile Duet device to the high end Symphony, X and Rosetta systems, as well as the FW ensemble unit. Mac Only
Mark of the Unicorn:
As well as developing the Mac DAW Digital Performer and Midi Interfaces, Motu are makers of a wide range of Interfaces - PCI, FW and USB. Mac and PC