The problem with the Aspire S3 is the smallish Enter key and tiny arrows mentioned in the review. I'm a heavy keyboard user so that's concerning. Worse is the battery life. 4 hrs is unacceptable for this price range, and if experience is any guide that will be down to ~2 hrs after a year of use.
I've looked at all the Ultrabooks and none of them seems good enough, so I'm wondering if there's another line out there that I can compromise on.