#3
I would just buy one of the cheap Korgs (the Chromatic if you know music thoery well enough and change tunings, otherwise the standard one). Considering the cheap ones work, I would imagine either of those should work fine. If you are going to use it to tune on stage (which is really the only reason, I can think of, to get one of those), then see which one you can see the display better. Both are reputable brands after all.
#4
I'm tempted to say the Korg. The display looks like it would be more visible and a lot clearer on stage.
#5
I've got the boss and have been giging with it for the best part of 4 years now, works great, tunes accurately enough for me. And the display is really easy to see on a stage in any light. people moan about its bypass, but for the job it does, its fine. I doubt there's that much different in the circuitry of them either if im honest. I've got the boss, I'm happy with it, and would recommend it.
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