Had the Sony Eriksson k800i which was okay.... Looking at k750i as it seems to have a better camera. Budget of around a ton...?
The K750i is basically the "old" version of the K800i - has a 2MP camera, wheras the K800i has a 3.2MP camera. But the K750i does have the ability to use the flash led as a light, which you can't do with the K800i, meaning you can use it as a torch. Not a big selling-point I know, but ....
And the K800i has a proper xenon flash....
I was dubious about an 18month contract, but went with phones4u because they can buy your contract out.
You can't use a PAYG phone with a contract sim apparently, which is one of the reasons I insure my mobile