I got duo Windows 7 / KUbuntu on my dell M8500.
My KUbuntu basically can replace Windows on all my daily development and entertainment. I evens has Office 2010, and all the tools I need (except Visual Studio)
I used Kubuntu daily and the only major issue is the video card driver (AMD Radeon HD 7570). One times / 10 after reboot, the VGA crapped at the login screen, and I have to reboot again (blindly via command line) to get back to normal
Here is my experiences on installation of Ubuntu on this machine
You might lost 1 week of frustrating to get Ubuntu the way you want, and working on a stranger OS might not as productive as your familial OS. For me, I love to test, and as a .NET developer for my daily work, I tried to get out of Windows OS at home, and taste other techno