I have an Alienware M17x, 32GB ram, 2TB HDD, Nvidia GTX card. All done on my own. I have had more trouble with that machine, before and after the upgrades. I'm all apple now.
For now I use:
-iPad 2 & 4
-MacBook Pro 13" (Late 2013) every option/upgrade
-MacBook Air 13" (Mid 2011) Also with every option/upgrade
iPhone 5 too. Not a single problem from any apple product. And yes, I worked for all this!
I just feel PCs are unstable, and I hate the UI of Windows 8. I'm keeping 7 for that one reason. For those who say Macs are limited and don't have the "open-source" freedom of Windows, thats a lie. Macs do just as much as PC's and more, and if you still want windows you can load it on there.