I know this is an Adams forum, but Matt at Obsessed Garage has purchased hundreds of "budget" pressure washers and tested to see which ones were up to par, all his videos on this are on Youtube. I would definitely go electric, if you get the right one, it will do everything a gas one would. If I didnt have my Kranzle, I would most likely buy *****.
EDIT: Also another thing, PSI is not what really matters, its the GPM or Gallons Per Minute that is the big factor to figure out.