I believe it depends on how the computer will be used. If its graphic designs, I would stick with Windows (cheaper) or Mac (expensive) since most-used tools in Graphic designs don't run on Linux natively. For gaming, use Windows.
On the other hand, if its surfing the net, email, video streaming and some home apps, Linux would be a better choice. I prefer using Ubuntu because of the community and support available. Most of all, you are 99.9% malware free with Linux.