I've been a die hard Windows fan, especially working in IT and managing 5000 windows systems on a daily basis. My wife has been using iMAC and MBAir for some time. Finally, I decided to give MBP a try. I purchased a $2,500 top of the line MacBook Pro 15" model in October of 2014, and has never looked back. I know it doesn't matter, but it actually does: the build quality. Obviously your laptop won't be any faster. However, after using an i7 maxed-out lenovo laptop it still felt plasticky. The screen tilting and the keyboard and the touchpad were all great. However, they just didn't feel anything close to what a MacBook Pro feels like. Finally, the screen resolution on the Retina model is great. There is not a single feature that I dislike. Being an IT guy, I get to use many different toys: from Lenovos, to HP's, to Dell's. However, I now carry my MBP to the meetings as well instead of my work-provided 13" XPS. In addition, it serves as my desktop replacement for all of my photography needs.
I'd suggest one thing: go to the apple store and just play with a MBP. See how it feels and how you like it. I've seen them on sale sometimes for $1600. Adding another $300 from an already expensive budget $1300 for a laptop that will serve you at least 4-5 years is not a lot if you look at it.
My recommendation is to wait for the sales and get the Apple. They also have refurbished models on sale at Apple.com, which now come with the standard 1-year warranty.