Do you have any recommendations for purchasing a pressure washer for home use?

I am looking to buy a pressure washer (also known as a power washer) for cleaning my deck and other areas around my house.

I used to have an electric one and I remember it was ok.

Someone suggested I buy a gas powered one, which may be stronger and also is not hindered by the electrical cord.

Do you have any suggestions about purchase options or features which I should look for?