Logo refresh

I have an existing logo that needs refreshing. The logo is for a music production company and features the initials and company name on a grey scale marbled background (see example). The intent is to give it a more chiseled look, i.e.; initials and name chisled into a block of granite. Possibly even a 3-D look to it. The logo will be incorporated into a new website design. I'm looking for options to choose from so be creative!