I have the same genny. Well, mine is yellow instead of blue. Wen Power 3500. It seems to be a good genny for the money. Fairly quiet and under $300. I've got 20ish hours on mine and it's been great so far. Just change the oil every 10-15 hours and I'm thinking it should last quite a while.
I run 2 HPS 150's and 4 Halogens with 300 watt bulbs. Has no problems, but when I just run the 2 HPS and 3 halogens, it can run 5 hours on 2.5 gallons of fuel.