I'm no fan of Windows, but have to use it at work. We had XP Pro for years - our company didn't switch when Vista came out, and only rolled out Windows 7 on us last year. The delay on the latter was due to getting some of our programs compatible with Win 7.
At home I use a Mac. I had a PC with XP and hated it. Bought a Mac in 2006, and still have it, and now I have several Macs at home. Other than not being able to run some of your familiar programs on a Mac, I would recommend a Mac to you. The Intel Macs are great, and with being able to run Windows on one, makes it even better. From what I been told, a Mac runs Windows better than a Windows based machine. You can get an Intel Mac to run both a Mac OS and Windows.
I haven't tried Windows 8, but Windows 7 is okay on the PCs I've used (my work laptop and my daughter's desktop PC). But, I will always buy a Mac for myself and my wife.