if your worried about keeping up to date and the contract you could have its not an issue, you only have to buy a new device not a new contact,
alot of windows mobile phones are sold without contract and can cost £400+ for the device only, so £279 aint really that bad.
you can always wait for the next best thing, that decision tree is 100% accurate, simple yes/no, no dithering, do i want one? damn right, queued on day 1, done!,
I got macbooks for me and the missus, 2 weeks later there was an updated version, ohh well, still got my macbook tho!!!