Hi, I'm new here. I need for academic purpose a very light and all-around ultrabook. Now the "dilemma". I was offered from a near shop a Surface Pro 4 (new) i5 4gb 128GB with a keyboard and office365 (4years) all included for a special price of 1000 euros. Online I read that a very large amount of people suggest the version with 8gb of ram and 256gb of HD. With the student promotion this model have a price of 1567 euros on the official online microsoftstore (if I include the keyboard and office. The extra HD is not so important for me, I have many external 2 TB HD and usb key. Mainly the files that I need are documents. Film, and other similar things stay in my external drives. So is about 600 euros for only 4GB of ram. What you suggest? The 567 euros difference is remarkable for me. Is so much important the differences? I use my personal notebook (hp touchsmart 2 i3 and 4gb) for web surfing, office, latex, R and SPSS statistical analysis and a very little lightroom postproduction of photos. For the battery life how is it? Fo example, without wifi, for "onenote only use" can I cover 4h in the morning and 2h in the afternoon? Sorry for the bad english, I wrote this in a sort of "urgency mode", the special offer will expire in two days and online I read people with opposite suggestion: a basic m3 and instead other people saying that 8gb is the minimum... Thanks in advance for the help.