I also have a MOTU 24 I/O. I love that thing. I use 3 Focusrite Octi Pre 8 channel preamps with it. They work great for rock. Each channel has a limiter/compressor feature that can be very useful. I do a lot of high school concert band recordings and they work very nicely for that too. I just run the line outs from the Octi Pres right into the 24 I/O converters.