(Sergeant Pepper's - £7.99 on Amazon, £10.99 on iTunes).
I know Apple users are terribly loyal, but is it really worth 25% of the cost not to have to deal with those old-fashioned plastic discs?
(I speak as someone who hasn't bought music in hard copy for about five years, and gets 99% of his music through Spotify nowadays, which I'm perfectly happy to pay £10/month to get ad-free and on my mobile phone.)