I was looking up generators too, thinking a diesel one would be the one to last longest, and I came across this web site, as one suggestion was to get a real Honda Generator and not one that just uses a Honda motor;
http://www.wisesales.com/
No offense but you will not be able to use that generator for months after an incident. You will be an obvious target.
Honda generators are the best; we’ve used the smaller models in Haiti with great results.
That being said, I’ve seen some people advise skipping the generator and purchasing a large power inverter to use with your vehicle. Inverters are much cheaper than an equivalent size quality generator, and there’s no extra maintenance, fuel to rotate, etc. An idling car is not going to draw as much attention to your home. I wouldn’t want to let the car run around the clock, but it can be run when needed, even to let a freezer run for 30 minutes 3 or 4 times per day to keep your food from spoiling.