USB, Firewire & Thunderbolt: Which Is Best For Audio?
The Audio Interface: USB vs. Firewire - Home Studio Basics
Amazon.com: RME Fireface 802 Hybrid USB/FireWire Audio Interface with 12 x 12 Analog I/O, ADAT/SMUX and AES/EBU Digital I/O, 30-in/30-out and DSP-driven Onboard Mixing with Effects : Musical Instruments