If you need an inexpensive, powerful, commercial grade generator that provides clean output that is electronics safe then the Lifan LF8500IEPL should be on your list.  There are a number of nice features included in a relatively low price for an 8500 W generator.

If you in the market for a small, inexpensive gas powered generator to run the very basics while you are camping or working outside, the All Power America APG3004D generator may be the unit for you.