Dear all, I have spent a lot of time investigating apple and I am finally convinced to make the big step of switching from PC to mac! I have come to the conclusion that MBA 13" 512 gb would be best for me as my only computer because I am always on the go (hospital, conferences, etc). I need your advice because I am uncertain whether the upgrade RAM (to 8) and/or CPU (to i7) is really required considering my basic requirements. I use the computer A LOT (sometime I spend all day because of the need to type in data for my research) mainly for email, internet, word, powerpoint, excel, adobe reader and iTunes. I might very occasionally use it to edit images with photoshop or create website (previously I only used notepad and explorer on PC). I might also add that if these upgrades are not required I'd rather not spend the money. I need the extra space but what should I do regarding RAM and processor considering my basic requirements? Should I not upgrade, or upgrade only 1 of the 2 or both? Many thanks in advance for your help!