I am toying of keeping my 2009 2.53 320 HD 4 gig ram 13 or get the newer MBA 13. I saw the MBA in best buy and love the weight and the idea of a ssd. Will I lose alot by going to the MBA with the slower cpu. I have PC gaming machine that I do all my heavy using for and use the laptop for college 99 percent of time. But Its getting long in tooth, warranty is gone, ans would like something lighter. Thanks for any advice.