There were quite a few pure sine wave inverters available on my website in the past, but I was informed by AIMS that they are being redesigned. They will be available again in February. Once the company has made them available, I will get them on my website as soon as possible.
The modified sine wave inverters work just fine for almost everything, but the pure sine wave inverters are even closer to the AC electricity in your house. Modified sine wave inverters may cause some minor background noise or distortion, where pure sine wave inverters have little or no effect on the motor of an appliance. Both are adequate for running almost everything in your house. It is not recommended to use a modified sine wave inverter for a laser printer or some power tools. The choice is yours to make, depending on what you are going to plug into the inverter.