Mitch,
I'm sure there are better settings for my guitar than the stock effects that come with the SD7, but I'm just not ready to go there yet. If I had to guess - I'd say that my road rig will include a small mixer that feeds the 2nd mic/instr input. This will allow me to process an iPad and the guitar and still monitor the mix through the internal speakers. I have these teeny passive mixers that work great to sum 2 or three sources with basic EQ. The mixer is about the size of a pack of cigarettes (so I'm told), and fits candidly on the shelf above the USB drive slots. This allows me to use a multi FX pedal for the guitar if needed.

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