I got the QUAD-Capture, and I use it almost daily. The AUTO-SENS feature works miracles! It has 2 XLR/TRL Combo jacks, 1 digital input and output, and MIDI I/O. It also has two outputs for a right and left monitor and for a set of headphones. It samples at 44.1k, 48k, and 98. If I were you, I would go ahead and get the QUAD because you can never have enough I/O for whatever project you are working on. It is more expensive, but in the long run you will be saving money instead of having to buy another interface because you find yourself with an I/O shortage. It is certainly worth every penny. Hope this helps even though I really didn't tell you anything that you could have found on other dealer sites. :o)>