If you are getting this UPS only for your PC then it is overkill & frankly speaking a waste of money. It is just a myth that modern activePFC psu don't work well with modified sine wave UPS. In fact a good tier psu(like 650W corsair TXM or RMX series) will work well even with 600VA UPS(of course modified sine wave) provided system load is under 300W. If you still want a pure sinewave then better buy a cheaper model pure sinewave inverter & spend extra money on getting lots of batteries for increased backup(assuming you want to play games on your PC using battery power for at least 2-3 hours a day or planning on using it for whole home backup).
