Honda generators are expensive, but they are excellent. You really can't go wrong with them. Especially if you want something as quiet and reliable as possible. Honda generators also put out a very pure sine wave, important for sensitive electronics (like computers).

Another good option is an off-brand generator with a Honda engine. It's not going to be as good as a 100% Honda generator (or as quiet), but in my experience they at least tend to be reliable. I wouldn't trust them to run sensitive electronics though.