You dont have anything thats going to pull massive amounts of current. I can see you having problems if your maxing your system durring the summer with all the lights on, A/C Cranked, and blending a margarita while poping microwave popcorn in your motorized recliner......

If the home is Piped, Upgrading the Circuit should not be too hard(I'm sure larry will chime in on this) if you feel the need. But I would go with a 20 amp circuit if your going to do any upgrading just to have the fluff...... Maybe even a 220 for the Kick ass RGPC sub station..........