Hi,
You're much better off going with a UPS rather than a surge protector. The UPS regulates power, filters power, and offers surge protection. For Mac, you should get a UPS that outputs a sine wave, not a simulated or square wave. Mac's don't do well with those UPSs.
The best models for the Mac are a
Smart UPS 1000 or a
Smart UPS 1500. It also depends on how much other hardware you plan to be plugging in to the UPS.
It's always nice to buy a new
Smart UPS, but if you're on a budget you can always buy a
Refurbished APC.
If you have any questions, I would be glad to answer them. I've been dealing with UPSs for many years.
Tony