I don't own a Yamaha but they have great reputations online in the RV/camper world and I've done some research on them. If I couldn't get a Honda for whatever reason I'd get a Yamaha as my second choice and not look back.
It's probably just like the gun brand debate or bullet choice debate; 2000 watts is 2000 watts and dead is dead. Honda led the way and seems to be the go-to standard but they are a little more expensive.
The Yamaha gennies are popular enough that there are dual-fuel and tri-fuel conversion kits for them as well.
The most important thing you can do is not succumb to the bigger, cheaper, better lure with some of the contractor grade generators. They are made for running lights and power tool etc., their power is not smoothed out well enough to be kind to sensitive electronics such as computers and everything else we own these days. Someone with an electrical background can probably explain the how and why behind it.
Aside from emergency backup and the production business we've found so many other uses for our gennie and will never live without one.
RobStar