Hi,
Vertex stabilizers manufactured in Bangalore are well suited for audio/video equipment. Many on this forum use Vertex. You may contact Mr. Murali on +91 91646 57788. They are specially designed for audio use.
As for UPS, if you want to consider an online UPS, the cost goes up though you will not need a separate stabilizer in this case. Moreover, I would advise against using a home inverter + stabilizer combo as the Sine wave from the inverter may not be perfect, notwithstanding the manufacturer's claims. IMO, it's better to just use a stabilizer without a UPS or inverter and let it cut off when there is a Power cut.
Best wishes
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