If like me you're a Mac user and can't stand Apple beautiful but lousy to use keyboards and mice, there aren't that many third party alternatives that are both good and not over priced.
One that covers both those points is Logitechs S530 pack. It's a couple of years old now but still works perfectly well and is far more ergonomic than Apple. Wireless, and offering as many extra buttons as you'll ever want to customise, it's gotten good reviews the likes of MacUser and CNet. Two potential downers: it's not bluetooth so you need to use the provided USB dongle and mouse is a right hand only.
Play are selling them for 22.99 which is £2 less than the next cheapest at eBuyer. You also get Quidco and there are a couple of vouchers flying around if you have more than £50 to buy.