Not to keep tooting my own choice of horns, but the Samsung I linked (this one) is virtually identical to the one you linked above, except it's got a 17.3" screen that'll run at 1600x900 instead of a 15.6" that runs at 1366 x 768. May not seem like much, but my roommate has a 15.6 and I've got a 17.3 and the difference is quite notable.

It's also ~$100 cheaper, probably due to it having a 5400rpm drive instead of 7200rpm, but I poked around some and found folks saying there was no appreciable difference between the drive speeds when using autocad.