[DiverDude]

There are a number of factors you need to consider:

-Average output power (careful, most are marketed by peak power ratings)
-Output type (inverter, pure sine etc.)
-Run time (usually specified at 50% load)
-Noise level

Power output is easy. Add up the consumption of everything you need to run, add a safety margin, say 20% and you've got your average power required.

Output type is trickier. Inverter is the easy answer but they are a LOT more expensive and typically available only up to around 3KW. Some pumps might not start without a proper sine wave output.

Run time is less of a factor and is often related to how big a gas tank they put on the thing. Inverter units throttle back to meet the load demand so they consume far less -but they consume at a variable rate so it can be hard to estimate.

Noise level. If you have prolonged outages, it doesn't take long before the drone of a generator gets on your nerves. The inverter units are FAR quieter that conventional units.

So if the 2000 watt Honda Inverter is enough juice for your setup and it's in your budget, I'd go for that. Realize that this will supply a little more than one household circuit so if you have a large setup that uses three 15-amp circuits in your house, you'll need a bigger generator.

Other things to consider are that you need to keep enough fuel on hand at all times to run the generator for the longest outage you think you could see (remember that gas stations can't pump gas in power outages either). You need to keep that fuel fresh, too. Once a month, pour it into your car and fill the jerry can instead of your car's tank. Leave a minimum amount of fuel in the generator. When you need to use the unit, fill it with fresh fuel and go. Run the generator for 10 minutes once a month or so.

Also think about how you will connect the generator to your tank's equipment if the power does go out. Don't wait for an outage to do this. Everything will need to be unplugged from the wall, plugged into power bars and then into the generator. How will you get the extension cord into the house ? In winter, you can't leave a door cracked for the cord to enter -plan for this.