1 & 2 remind me of the logos on boxes of lawn grass seed where as I can picture the others screenprinted on a effects box or moulded in chrome-painted black plastic on an amp. The retro block lettering suits the products. I think you need to make the leg of R a lot heavier, and the counters in B closer to the centre, the way R's counter is. I'd like to see 5 all in black with those adjustments.

The bursts are perhaps a bit too ornate to work with the lettering. I think the third is best and that should be filling the space in the bottom right at optically the same height as the letters.

Thanks, Justin. I agree with most of what you're saying. I'll work on some more options.

#5 is nice — good sense of character and memorable style

I am not the only one to see a mike in the 'R' in 'Sunburst' in #6, am I?

Thanks, Penn.

O.K. some edits: The R has a thicker leg. Option two has a more top-heavy B, closer in style and size to the R.