If it truly matters to you, get a true sinewave UPS with 3000va rating and run it in battery mode.
Wall Voltage is used to charge the DC batteries. Then an inverter is used to change battery DC to AC for driving your load. Perfect sinewave with zero noise. Zero. Look at Double Conversion models.
As far as protection, you are never connected directly to utility so it is ideal in this scenario. No spikes…. Ever!
I run a Cyberpower unit rated at 2200va. Weighs like 80lbs. Runs three systems at same time no prob. Other units fine too I’m sure. We install Eaton units regularly.
OL2200RTXL2UN
