I have several generators that I use around my place.
My favorite is my 2KW Yamaha but coming in a close second is actually a Champion unit from CT.
I purchased it on sale and saved a bunch of $$$. It starts great and runs well although it is noisy compared to my super quiet Yamaha.
If you are only going to use it occasionally I would get one of the propane powered ones. No need to worry about fuel issues, stabilizer, gumming etc.
They are a few $$$ more but worth the price if it's going to be sitting more than running.
You really need to have a generator transfer switch installed to make life easier as well. Just plug in the generator, flip the switch and fire it up and it will power the circuits that have been connected to the transfer switch.
http://www.canadiantire.ca/en/pdp/champion-6500-watt-dual-fuel-generator-0550366p.html#srp