Being the silly, silly, non-english man I am I thought you meant the weight pounds...
I can't really suggest anything off the top of my head but the only thing I would contribute is that bass is generally NOT good for gaming..you want a very balanced headphone for gaming, generally.
Why do you need a removable cable? Its nice but I dont think it should be a deal breaker if you like the K550.
My only suggestion is AUDITION BEFORE YOU BUY. If at all possible search for places near you that have a decent headphone selection and AUDITION AUDITION AUDITION, bring your own music too if possible, they'll usually let you plug in your st00f to audition.