Similar to the pa70g.

I have been reading a lot about the different types of projectors and I like the fact the bulb lasts so long on the pa70g. Does anyone know if there is a similar option for a bit less or if the pa70g is expected to go on sale for that $399 deal anytime soon? I would love to snag one for under $500 if possible. Thanks

Also what's the main difference between this and the pb60g