So, updating the game room and we have never had a gaming system and want a PS3 due to the blu-ray, etc. The hard part is which one? The 40, 60(ebay), or 80gb? We have two kids (6 and 9) and my concern with the 40GB is that it won't play older games. We have no older games but there don't seem to be a lot of kids games on ps3 yet. The 80gb has some backward compatibility but apparently not much while the 60 has full compatibility. . .?! So, what do you suggest? Pricing is 40GB-399, 60GB (ebay)-475, 80GB-499.