When I switched from PC/Pro Tools LE to iMac/Logic, I tried to work with my MBox2 but gave up. It's just not well suited for working with Logic. I bought the Duet for $500 and it works great and sounds much better than the MBox2. Better pres and converters. I'll upgrade to an Ensemble soon, but for $500, if all you need is two channels, the Duet is a great way to go. Also, latency is much better with Duet than with MBox, at least in my experience. I keep my buffer at 256 and can barely discern latency at all while getting all the plug-in power I need. If I need to truly knock out latency, I can still go down one or two more buffer sizes.