I'm thinking about buying a pair of gamepads for my iBook. Which brand and model should I go for? Apple's own list of gaming devices lists the following products that interest me: Gravis Eliminator AfterShock Logitech Dual Action MacAlly iShock II Nyko Air Flo Ex Any of these would you recommend or not and why? I've also heard of using a PS2 controller through an adaptor. Is that any good or any better? Are there any other products out there that I've missed? Any advice would be appreciated. Thanks.