What size?
What will it be used for?
How often will it run?
The Champion brand is a GREAT bang-for-buck generator. It's loud, but quieter than most open-frame contractor type of generators.
They've got outstanding customer service.
For all gas generator that aren't used often, you should do the following:
1. Use Stabil or some other fuel stabilizer.
2. Use synthetic oil and change yearly.
3. Run engine dry (use the fuel shut off) when storing for longer periods.
4. Start up and run under medium/heavy load for 10 minutes every other month.
If you need quiet, then look at the inverter type generators. They run at lower RPM when amperage isn't required because they produce a DC voltage that is inverted to AC.
Non-inverters like the Champion requires constant (high) RPM to maintain the 120V AC at the proper frequency (60 Hz).
Some prefer their sound because it is constant even though it's louder.
Good Luck.