hi pan... i would recommend 725 following are the reasons
1. screen is 11.6 inches vs 10.1 in d270
2. resolution is 1366 x 768
3. usb 3.0
4. touch pad is advanced than that in d 270
5. dedicated graphic memory of 256 mb which is absent in d270
6. meets system requirements for installing windows 8 for which in d270 you need to hack into the registry.
7. price difference is not much
Thanks for the advise, but before I saw your reply my Dad went for the D270 (mostly because of the better battery life).