hello guys. i am planning to buy SP4 but confused as to which version to get. this will be my first ever surface tablet so need little help here. basically i am confused about the 4 vs 8gb ram scenario ( will be buying i5 cpu version). Now my activities on sp4 will consist strictly of browsing, youtube , watching 720/1080p movies , netflix/hulu and microsoft office. i WONT be doing any sort of rendering/editing or any other heavy duty stuff. so i was wondering will 4gigs be enough to fulfill my needs? yes i know 8gigs version is more future proof but i probably will get new surface after 2 years and am a little short on money so will 4 gigs version suffice ?