With the difference between the third generation and the fourth generation CPU being so small it is not really noticeable when used but if you need to save money going with the third generation CPU is the way to go. Making decisions like these can seem very stressful and may take up some time to create your perfect design but all you have to do is compare and contrast what is out there and pick which ever one is the best Mini ITX case that is the one for you. They are all really similar it is just about how much you can spend on one and where you are going to place it while it is being used.