IMHO, the Core i3s are just not good enough any more. More people use AMD's FX 6300 as opposed to the Core i3 now, thanks to the amazing value you get with it. Secondly, Casecom cases, even their high end ones, are terrible. They use thin metal which can deform easily with tight screws and heat. Plus, don't get an OEM copy of windows 7. The key ties with the serial numbers of your components. If you were to upgrade or replace a broken component, you won't get the updates any more. Here is a slightly better build for around your budget -