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If you are designing a logo then 90% of the cases it should be like Width > height. May be yours is a mandatory requirement.
Try to lay the guitar on the ground with LOGO TEXT on top or bottom.
I prefer Image-1 as it catches the eye.
I like the socket string attached to the character S.

thanks for the advices... I will probably change the guitar as my friend doesn't like so much but i will surely hold the socket string and the logotype. I've added a noguitar version which solve the width vs height problem