Hi all, I own a 13" MacBook Pro (late-2011) with 2.8 GHz i7, 4B RAM and 750 HDD. It's battery cycle is almost 900. When I first had it the battery would last 4-5 hours, but now it almost never reaches up to 4 hours. It is running slow most of the time and overheating etc. I'm now considering purchasing the latest 13" retina MacBook Pro with 2.6GHz i5/8GB/256GB But I can't be sure if it is a wise decision while I already own a MacBook Pro with i7. Would only increasing its ram to 8GB help me have a faster running MacBook than the mid-2014 rMBP?