I currently have a cheap Targus power inverter that I use to charge/power my laptop, iphone, ipad, etc. While I have used this inverter for years, I have noticed odd behavior with my touch screen controls on my iphone and ipod when plugged into the inverter which does not give me the warm and fuzzies. I am concerned about damaging future peripherals and would like to invest in a pure sine wave power inverter in the $150 to $200 range. Unfortunately it looks like a lot of pure sine wave power inverters have cheap fans which quickly ramp up to full speed. I don't want to have an inverter in my car that sounds like a jet engine at take off. This inverter sounds pretty good, but some of the reviewers on amazon complain about the fan noise: http://www.amazon.com/Samlex-SSW-600-12A-600-watt-Pure-Inverter/dp/B004OU3A5Y Any suggestions?