All have dedicated graphics.
The last one at currys is the best one but the first and cheaper one will do you fine. Overall unless you play games it would suit you better. If hard drive is lacking on it you can get a 320gb for under £100 and 80gb ones for about £50. 120gb would be about 65 so it makes sense if you dont really need oodles of power to get the first one. If you have money to burn the last one is by far the most powerful but the first would be best for the jobs you describe.