Champion Inverter questions

I did see the "official" Champion Generator topic but it's getting rather large.

I currently have two Honda Inverters, a 650W and a EU1000 with a hard start condition. I'd like to get BOTH running and sold so that I can U/G to a larger genset.

I'm very interested in the new Champion Inverters but I can't determine what model I should be looking at. It appears they have a gray colored model and two yellow colored models. All are 2000 Watts.

I'm referring to this link;
http://www.championpowerequipment.com/products/generators/inverters/

The gray colored Generator, model 73540i, w/USB appears to be the same as the yellow models BUT I see the "w/USB" and can only determine the "w/USB" means it has a USB adapter that plugs into the Cig. lighter for charging USB phones & such. It also has a listed 1700 Rated Watts (the two others dont).

The yellow model 73536i just lists 2000 max watts and appears to have a 12VDC charger circuit/cables

The yellow model 73531 also lists 2000 max watts but no 12VDC charger.


So, Gray or yellow, if yellow what model? Also, on the site they have Sams Club listed BUT I visited my local club and only see the larger generators. Not suer where I can get one of these locally.

Thanks all