The specs are def. my main consideration, after that I think price comes next. Spending 4K - 5K+ for a mostly non-upgradable 'pro' machine is madness imho.
I built my first Hackintosh end of last year... I was planning on selling my completely beefed up 2013 iMac and didn't want to get a new one. I want to add HD's to my machine, replace my gfx card and add extra monitors. The iMac limited me too much.
Before the iMac I had a
mac pro 5.1 which probably has been
the best mac I ever owned. Loved the way it looked and all possible ways it could be expanded. The build quality was phenomenal. Non-Apple using friends I showed it to still talk about it
The iMac was nice and fast, but somehow I never really loved the machine I did like the other Apple products I owned. I had a beefy PC for gaming and looked if it would fit the bill for a Hack. It did and so when I got it working I sold my iMac. I do still have a new 13" Mac-book pro, but for daily use / multi monitor I want a big rig which I can adjust to my desires.
If the new pro comes out and it is as good as the pro 5.1 (without it being ludicrously expensive) I'll certainly consider it... until then I'm driving a custom build macOS / Win10 machine.
In the end macOS feels so much better than Win 10. Win 10 isn't bad, Microsoft came a long way, but if there would be a good mac pro in the Apple line-up I'd not look at Windows for one minute. Ah well... We'll see
the Hack fulfills my needs for the time being. I may even build a new one to bridge the gap to late 2018!