You're going to love it. After using it for 20 minutes, or maybe when you get used to the scrolling, you won't care about Windows anymore.
Regardless of the hardware, OS X is a polished gem of an operating system. It's updated like clockwork and it's slick as heck. It does the very best of sucking every ounce of power out of your hardware, from my point of view it's easily twice as efficient as Windows.
I was a long time Windows user, I've taken every step from 3.1 to Windows 7, at that point I was geeking out and usually just ran Ubuntu Linux full time, while using virtualization for my Windows apps. I thought to myself there has to be a better way to get that Linux/Unix ('nix) stability with the compatibility I need - and it was staring me right in the face. I installed Lion on to my PC, shortly after getting my feet wet I bought an iPad, Mac Pro, iPhone and last week a cMBP (13", 2.9 i7, 8GB RAM, DIY upgrade to 256GB SSD) and I could not be happier in any respect with the technology I use.
I live in NY and until fairly recently lived in the city, my exposure to Apple users was mostly of the hipster variety so for years I just looked away. Once I got in to it though, I mean, OS X - this is SUPER geeky stuff, It's Unix, if you want to tinker oh boy can you tinker. If you want to sit back, relax and just use the machine, you can do that too. These Apple guys are the best at what they do.
Sure, you'll need to force quit an app here or there, but your computer won't freak out and pause and read the hard drive for a minute and lock up, you won't get a blue screen flash. You won't have to dig through 30 sub menus to change something, etc. It's not even the faults that Window's has, but it's just the overall responsiveness and polish of OS X that makes it so much better.
It's fast - REAL fast, it runs the latest and greats apps, from Office to Adobe's suite, and have you noticed more and more game devs are developing for Mac? Their app store is sweet and curated but you can install anything you want.
The design of the machine itself is top notch, When I use my Apple stuff sometimes I really think to myself, wow, they just did think of everything, and it shows.
It's not a spec to spec, dollar to dollar comparison, it's the overall value of the experience.There's an inherent value to using OS X and another one for not using Windows, I'm really sure you'll see that after you use it for a bit.
P.S. did I mention it was fast?