The Xbox 360 not reading DVDs was the second error in my 360, after the first RROD. (There was a second RROD after that)
My advice, sell it before it breaks on you! I tried to keep pushing the little lifespan of my 360 and ended up selling it broken which is worth a lot less.
AS for your PS3, get it back, or else you'll spend christmas with no console what so ever.