I understand and love to build my own machines, however most people just take the easy route and go pre-assembled.. this proves that macs aren't overpriced like so many people try to say.
The thing I like the most about Apple besides their support is their ProCare program. I can pay $99 a year for 52 hours of training on any program(s) of my choice. That's hard to beat. It's all done on my time and flexibility.
Let's talk NLE's since you're familiar with them cyn. If I take a 3 day course on Avid or Discreet, it will cost over $1,000 not including hotel etc. I can get ProCare for $99 and get more training on FCP and photoshop or anything. That is one reason that makes me pro apple