DO NOT PUT A LARGER BREAKER IN THE PANEL!!!! The wires in the wall are not properly sized for over the 20A breaker. Fire is the biggest risk. If you can afford it, the ideal is to put your system on a separate 20A circuit. A good UPS properly sized to the system will also often include some form of line conditioning (I have used APC products for many years, check out their site for more info. on what they can do).