Those specs do not mean anything without the THD ratings alongside the power output. Who rates an amp into a 3 ohm load? Nobody. Granted it is only $149 but who wants a 5.1 system that can’t play loud?
Woot is selling a BenQ 720p projector for $480 (March of projectors, main woot page). BenQ is a reliable brand, and this is a nice projector. If its a small room that will be dark and you don’t care about a dimmer projector, you could also go with the 500lm led one
EDIT: The BenQ may be factory reconditioned, according to ThunderThighs on an earlier sale, this means that the bulbs aren’t new, but have a significant amount of usable time left