Maybe look at the viewsonic pro8200 too, it is more than 500, although I did pick up a new one in dec for 650. So look for sales. The pro8200 is 1080p, 3 year warranty, 6,000 hours on bulb in eco, 20 watt (10x2) speakers, excellent gaming because low lag, and safe if you are rainbow effect sensitive.
Good luck on your next purchase, 800x600 doesn't cut it for gaming or blu-ray movies or high def tv football or tv shows. 720p could work, but Next year the new consoles are coming out, I wouldn't settle for 720p, maybe a few years ago, but not today. But if you can't afford it, get the best you can afford, right?