So I have a 17'' Macbook Pro running Logic 8 and an Apogee Duet interface. I came from using the Presonus Firebox and recently sold that and replaced it with the Duet. The difference is astronomical in my opinion. And the Duet is only slightly more expensive. The Duet is very versatile and completely configurable, the big volume knob is pretty awesome too. You can set it's button function to mute monitors but keep headphones live, very useful if you're doing self recordings. The volume is indicated on screen regardless of what program you're running, very nicely intergrated with Mac. Compare to the Firebox it's dynamic range and clarity of output far exceeds the Firebox. I found the Firebox ins and out would distort and compress very easily when pushing levels, I have yet to hear anything similar on the Duet. I read many great reviews before buying this, and now I know why. It has worked flawlessly with great sound. Probably the most reliable and intelligent piece of hardware I own.