I did a lot of on line research and for output vs noise this appeared to be the best. However none of the national chains carried it. Was able to get it through Power Equipment Direct. In reviews I saw a lot of comments about no indication of needing to connect the battery first. They listened and it now has a tag indicating that. Eco mode definitely reduces the decibels however have yet to test it under load.
I just received an iGen4000 today. I bought it due to a recommendation by the department head at a local building supply store. It is many times better than the unit I'm replacing. The electric start will save my sore back and allow my family to start it if I'm away when needed. Overall, vey impressed and satisfied with the quality and features.
After breaking in the iGen4000DFc, I was impressed with the ease of use. Only addition that would have made it easier: when using remote switch, that the battery switch could also be turned on / off. Great product for use on my fifth wheel unit.
I bought this a few months ago to replace my 1800 watt generator. This one has twice the power and it runs off of propane too, a bonus if you have an RV.