I have used both honda and Yamaha, and I personally prefer Yamaha.To me what gives it the edge ia the fact that it has a fuel shutoff, which you simply turn a knob and the gen will drain the fuel from the carb keeping it from "gumming up" caused by ethanol mixed fuels that are available today, and a 3 year warranty.Now my opinion is unless you're running a Power hungry water heater, you really wouldn't need much more than 2000 watts which both Honda and Yamaha make,they'll even run a sump pump. while they're not carry on luggage lite they are portable weighing in roughly 40lbs.They are pricey though roughly $1000 us but you won't find too many that are as quiet, and with the economy mode feature on both they automatically boost up rpm's as needed.whisper quiet if you're not drawing heavy power, but not obnoxious while under full load.Now as to whether gas or propane there are kits that are sold online which will allow you to use both fuels (actually tri fuel third being natural gas ) it takes a little tinkering but not impossible by no means, and their is one specific brand which won't void your warranty.Sorry I didn't post any links but I'm a little gun-shy as I once did so only to have them removed by mods.But all this info is out there on YouTube and amazon.Almost forgot these babies are also pure sine wave. aka clean power, which is what we all should be looking for anyway keeps our electronics happy and our motors from humming and our LED bulbs from flickering.Now for those of you that are looking to power your whole house please make sure that it isolates your side from utility side, god forbid crews are working in your area under the assumption there is no power and they come across a live line coming from your set up.Dios mio!!!