Wii is OK if you are expecting to play it with other people. I have several games for mine but only play on it when my friends come round.
My PS3 is getting hammered though seeing as I'm off work. Nothing beats playing Gran Turismo 5 Prologue on a 1080p TV.
But if you are a cheap arse I suggest you don't buy a PS3 as there is absolutely nothing "in the news" about it being modded. Sony have won the war against pirates this time round.