Unfortunately, I can't even afford to upgrade my computer right now, let alone buy a new one. But if I could afford it, I would grab up one of the Ubuntu laptops in a heartbeat. (I'm with some others on this forum when it comes to desktops, I prefer to build my own, but laptops are a different animal.)
I did say that I would keep Ubuntu on the laptop, but that may not be technically true (it depends on how you look at it). It depends on whether Kubuntu qualifies as "a different distro", which I don't think it should, and I wouldn't remove Ubuntu, I would just add the Kubuntu desktop to the Ubuntu installation. »