Great feedback! I'll revise the designs that you mentioned, and submit the designs again. I used the "Recording On Your Turf" slogan in #64, on the bridge, but It's kind of small. I'll try placing it in another location. I'll also lighten the microphone on #64, or make it slightly different.
I may also use halftone dots for #63, so that you will still have the gradient look, I case you used it in a black or white colorway.