Anybody have experience using a UPS with sine wave output on their audio system? I've been looking at the Cyberpower CP1000PFCLCD or the Tripplite SMART500RT1U. Both advertise real sine wave output, both protect against sag and surge; sounds like either would do. This is for a smallish audio only system, a cd player, tube pre-amp, and a 150 watt per channel amp. Has anybody heard what these might do for this application?
The H15 discussed above looks great, and the Amazon price is nice, but the UPS seems to add some functionality at a lower price. That might be good, if the sound is improved over just a standard surge protector.
Thanks in advance for your comments.

Tom