Hey FirstOn, first off, why change your name? You've probably used that name for some time now, hence why your online friends know you by that. Second off, why not incorporate your name into your username? This could simply make it unique, and may notice your the only one with it... since there's what 500000+ "ghost" "leet" "insert other cheese name here" etc etc. That's the beautiful thing behind it, it's your identity. Third, why let other's choose names for your business? Your the one with the business plan, idea, thoughts on where and what your selling etc etc. I don't think I've ever physically known of a business that had to publicly ask for business names. You got the fine idea behind your company, it won't take to much effort to think of a name for it.
But anywho, my two cents, take it for what it's worth! Good luck with your bizz and name bud!