I don't know why people recommend waiting. You guys realise that is incredibly likely that there will be NO backwards compatibility. That's the entire PS3 library made unavailable. You have at least 2-3 years AFTER the PS4's release before it becomes profitable for developer to start remastering PS3 games so at best if OP waits, he'll be looking at a 3 year wait before he can play any of the games he want's to play now and that's IF the game he wants is in the FIRST batch of remasters.
If OP has money, and if OP has games in mind that he want's to play then he should buy the PS3.