I need some opinions on my power needs.  I am looking into getting an Onan commercial generator.  What should I look for? Should I be concerned with the watts or the amps?  All of my equipment(2-1200w warmer, 1-500w soup kettle, 1-1450w water heater) plus a small fridge and water pump.  Total watts is 4340 and total amps 56.2 for all of my equipment.  Am I good with a 5500 watt generator?  I plan on some lights and later down the road an air conditioner.  Am I good with 5500 or should I go with a 7000watt? 
Is 5500 too big?  Will these pieces of equipment cycle on and off that would allow me to go with even a smaller gen set?