Originally Posted by Kamiak
the 1000w will do all the things that you described, but that is about all. The 2000w on the other hand, albeit slightly heavier, slightly louder, slightly thistier, and slightly pricier will do just about everything you need, now or later, except run your AC. My recommendation is to buy the 2000w.
When I have a customer who asks about a Honda EU1000i generator, I know they are usually looking for the smallest unit that will do what they want. What they don't realize is how many more things they will want to run after they start using it regularly. I've lost count the number of customers who've told me the bought the EU1000i and wished they'd gotten the larger 2000 watt model. Twice the power, of course, but for not much more money, and expandable (EU2000i Companion model) to a whopping 4,000 watts. I've yet to run into a customer who bought an EU2 and wished they'd gotten the smaller EU1 instead.
The EU1000i is ideal for certain situations. For example, if you're a hiker or must hand-carry gear/equipment, it's great. Likewise for pilots of small aircraft who must carefully watch weight requirements.
Finally, understand the EU1000i has a 2-year warranty, and is a 100% all-aluminum engine. The EU2000i has a 3-year warranty and has an aluminum block, but a longer-lasting cast-iron cylinder sleeve. On another forum, a guy recently rebuilt his EU2000i after logging over 10,000 hours of operation (!).