I'm looking for a new laptop for next year and I am looking very seriously at the Dell XPS 15, the MacBook Pro (Retina) and the yet-to-be-released Dell Precision M3800. I am currently studying engineering but also do some film making as a bit of hobby. Currently for class I use programs such as MATLAB, Solidworks 2012, Autodesk Inventor Pro etc. I also then use Adobe Premier Pro, After Effects, Photoshop etc. I also want something lightweight that I can carry around with me. I also consider a good screen to be essential. Which of these three would you choose and if you have any other ideas what are they? I don't want to spend more than $2500. Thanks - Matt.