Proper portable generator to run a Jayco X17Z?

if you're not going to use the a/c, get a 2000 watt generator. for the price difference the 2000 is much more worth it, over the 1000.
Along with the others mentioned, at Costco, there's a 2000w generator with a Yamaha engine, that can be paralled.
it costs $599, I think and has good reviews.