i would suggest you try and match, or come close to matching, the side art of the cab to which you want to fit the cp to.
if you had that readily available , i bet people would have loads of idea's as to what would suit better.
i do understand where your coming from with the logo issue , is there any possibility that the logo can be made into something
which you like or want ? eg - the codename of the cab or name of the cab ??
artwork though, is a real pain in the butt. the art i settled on for my cab, i originally loved it, but when it was printed outt full size i felt it wouldnt work.
there were pixels everywhere and looked too oversized . but , because most cabs are used to play old games, it suited the theme a bit better

ive grown to like it, rather than choosing it , but if i could go back and change it i would.
i hope you get something suited to your tastes though, because the final finish of a cab is more important than the original cab design itself.
if you stick something on it that your not sure of , you could end up hating it . spend alot of time on this and dont settle for something unless
your full sure you like it.