Costco has ETQ TG72B12 generator with power output of 8250 watt surge and
7250 watts of continuous power on sale $849.99 - $200.00 = $649.99 (includes
shipping).
Link: http://www.costco.com/Browse/Productgroup.aspx?Prodid=11603110&
The brand is somewhat unknown, but reviews on Amazon and homedepot,com (for
a slightly different version which also includes throttle control and hours
meter) are pretty good (search for ETQ 7250).