As it is a laptop, it naturally takes more of a beating as part of “normal wear and tear”. A laptop is probably the only instance where I’d recommend considering an extended warranty. (For a private individual, that is.)
One nice thing about AppleCare (and least in the US and i assume is the same in the UK) is that you can wait until the end of the warranty period before buying it. One year from now might be a batter time to evaluate how important AppleCare will be to you. (Don’t wait for the last day, decide and act at the 11 month point.)
If you’re not thinking of upgrading by then or if you’ve had any problems in the first year think a bit harder about it. If it’s performed flawlessly or by then you’re eyeing that Core 4 Duo version it could be better to save the money and apply it towards the next machine.