Power help


I know that power is probably the weak link in both of my systems. I have a Linn system in my media room and Violectric headphone system in my office. For both, I have them going to an APC XS1500 Backup UPC. Is this terrible? My house does have occasional power hiccups and outages. Can someone please give me some advice on reasonable ways to upgrade my setup? 
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I think those PC backup power supply units sound pretty bad. Why not try it with and without the UPS?
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The APC UPS puts out terrible, square wave power that’s full of noise that even the best linear power supply can’t clean up. The APC also doesn’t cutover cleanly from utility power to battery power.  You could go with an on-line pure sine wave output UPS like the Eaton 9130. The only downside of the Eaton 9130 and other high quality output UPSs is they have noisy cooling fans, so they need to be located outside of the listening room.