Hi guys. I've been a windows guy my whole life but after owning a few apple devices i feel its time to upgrade my awful acer laptop, and have decided to give a macbook a go. I will be using it for browsing the web, recording music (with a USB 2.0 audio interface), streaming videos (netflix etc), light gaming (League of Legends, Hearthstone) and some light work (spreadsheets, possibly blog work). I am thinking of getting the non-retina MBP at £899 with 4gb ram and 500gb hdd. Is this a better investment due to upgradeability? I wouldn't mind the 4gb 128gb ssd Macbook Air at £699 - but for £200 more is it worth getting the nrMBP? The retina jumps right up to £1129 for 8gb 128gb ssd. If it was really worth this price hike then I would pay the extra. It would be used around my house as I don't have space for a desktop - it would be my main and only PC. I already have an external harddrive. Please somebody help me choose. I apologise for all the questions. Cheers!