Whole house surge protection/voltage regulation

I just completed my new listening room and heve installed four dedicated lines for my audio gear. Rather than get four seperate AC units from PS Audio or the like (which may be current limiting on my power amps, and be pretty expensive anyway)I am looking for something that can be installed at my service panel to control/protect all four lines. I would love to find something that would combine surge protection and give me a constant 120 volts without breaking the bank.

Does such an animal exist? I have a freind who is an electrician and could do the install, so that is not an issue. If anyone has any experience please help.

Thanks
Chris