I like Champion 5500 more than Generac. :)But I would buy Generac. However, portable ***Link Removed***generators take a lot of abuse. If you don't know EXACTLY how well it has been maintained it is a gamble. I'd get the Generac and take care of it from day one.:D
generacs are good until they need parts or a tech issue comes up. their cs is horrible from what ive read on other boards. look at ratings, go to the 1 star list and see why people give that 1 star. with generac its typically a parts / cs issue. i called champion once with a couple of questions they couldnt have been nicer and i got all the info i was looking for.