I have never used Macbook. I was using a MSI gaming laptop for 4 years. I love my laptop but it is not portable, its heavy, low battery and plastic. I want to switch to a macbook. I will use it for only work. I am a freelancer software developer. The reason I want macbook is I heard that macbooks have no performance loss unplugged and have long battery life. Budget is important. Max ~1500 $.Which one is suitable for me?