I'm about to take the plunge and buy a Mac of some description after using PCs for 25 years and I thought I'd dip a toe in the water with either the MBA (13" 2.13GHz) or the MBP. However, whilst the majority of tasks I do are around the normal web browsing, emails, documents, music etc, etc. I do want to be able to use the machine when I'm away (I travel a lot) to watch video content. Typically this video content is either 720p or 1080p MKVs encoded via x264. I don't want to have to re-encode anything (I've never had to on the Windows laptops I've used recently) in order to watch the content but this would be a show-stopper if I was unable to do it on the MB I bought. So - any all advice/experience gratefully received.