I forgot to mention, the contract includes £185 cashback over the 18 months aswell....
TBH, I personally don't want either really, as Jack says, I have an xbox360 and a PS3, my missus has a DS lite, and I also have a PC, the chances I would "play" either would be slim.
My missus and daughter would like the Wii, I doubt I would play it, and the PSP, well, the only time I would play it would be at lunchtimes at work, while travelling, and while on holiday, the DS was a bit of a godsend on holiday in Aus.