I went through the same thought process in December, never owned an Apple computer but needed a new laptop. Despite trying to fend off the idea of getting a Macbook (due to some combination of price/not wanting to succumb to herd mentality/proprietary nature of Apple) I caved.
It felt silly to spend a lot of time researching and configuring a custom laptop. I've never purchased a pre-built desktop but customizing a laptop seemed too poor a risk/reward proposition for my liking. Even with a great deal of effort it would be difficult to create something comparable to what I could simply purchase.
Apple's hardware is easy to appreciate down to small details. You can open the lid without holding the other half of the laptop (my previous laptop would lift up otherwise) and the screen isn't too loose either (doesn't bounce when you type hard). The speakers sound orders better than any of my previous laptops. Battery life is great. Retina is beautiful & responsive (easy to read text, even while scrolling). The trackpad is unbelievable for a variety of reasons (click anywhere, accuracy to the very edge of the pad, multitouch/gestures). I hadn't previously seen any trackpad worth using let alone nearly as good as a standard mouse, but haven't ever needed to connect a mouse to this one. It's just a great overall experience.
There have been a couple software glitches that required a restart to fix, but other than that and the temps (~90°C) it reaches under load it has been a pleasure (@ 2 months of heavy use). Figuring out OSX took a week or two.
I don't envy anyone who tries to save money while achieving a similar experience.