It sounds like you are a PS3 fanboy as well. You could point out to him about the RRoD or how all he can play on the 360 is shooters with other 8 year olds calling each other faggot. But you choose to defend the attack with "PS3 has potential".
I don't really see how he is a Xbox fanboy as he mentions the Wii mote and just insults the PS3. I think he just hates the PS3 which is ok to do. Just next time don't get going about it by defending it. Just respond with something like "I prefer to play more than just shooters" or "I don't like paying for subscriptions to online games" or even "I like my console to be able to play HD movies"