Here's a
link to a post I made in thread last year regarding inverter generators.
I haven't had any trouble out of the Northern Tools Powerhorse, but I haven't had a lot of opportunities to use it. I run it for at least 15 minutes every 30 days with a space heater attached for load, and I've used it at the house for several hours during power outages. I only have around 20 hours on it though.
For the reasons I referenced in the other post, primary being Northern Tools in house service, I would definitely purchase from them again.
Someone recently posted this
link to a company that does aftermarket extended run fuel systems. Looks interesting, but pricey.
I'm not affiliated with either company and don't have any first hand knowledge of the extended run systems or the company that makes them.
Honda has always been a good product, but they aren't worth the price difference to me. The Honda is more than double the equivalently rated Powerhorse.