The problem with these great PC's at reduced prices(compared to a Mac) is that they all have to run Windows... When you buy a Mac you are getting not just the hardware, but the software too, a whole integrated system.
True (although most could also run Linux) although that argument isn't as strong as it was back in the days when it was Mac OS vs. the old DOS-based versions of Windows. I used Windows as my main system for years, and its perfectly productive
once your used to it. Heck, I'm unproductive when using someone else's
Mac because they don't have it set up the way I like. Plus, people don't spend most of their time playing with Finder/Explorer - they run
applications. If you spend your days pounding at FCPX or Pixelmator then you're probably going to be sticking with Mac. However, if you're using Adobe CS then it's just going to take a few days to mentally re-map your Command and Ctl keys... Increasingly, I'm finding that most of the applications I'm using are crossplatform... and if you're into cloud/browser-based Apps...
People I've talked with who use Windows 10
heavily are pretty happy with it, esp. when using clean installs on new hardware - most of the issues have been associated with upgrades and updates, and one reason
those are problematic is part of the big Mac/PC compromise:
The choice of Mac hardware is very, very limited. That greatly reduces the diversity of hardware that Apple have to support & test, making upgrades a bit less of a crapshoot (not that Apple has a spotless record) but its bad luck if you want a combinatiion of features that Apple doesn't have to offer.
The 27" iMac is possibly the best-in-class (mainly because its the only true 5k all-in-one). The new 2016 MBPs may be best in class if you want a powerful ultrabook and don't have a load of existing peripherals with what Apple laughably calls "legacy" connectors - but the choice of PC hardware is far, far wider. Want a reasonably powerful headless desktop with good graphics? Hope you like 3-year-old CPUs and want a FCPX appliance like the Mac Pro. Serious gaming system? Ha ha. Mobile workstation with lots of power and built in storage? Nope. Cheap'n'cheerful sub-$500 "second laptop" that won't hurt too much if the kids wreck it or if it gets left on the train? Nope. Disagree with Apple about the usefulness of touch screens or 2-in-ones? Sorry, you're just wrong. Whereas there's a large choice of those in PC form and if
those don't fit the bill there are PC builders who will let you choose the exact components you want, assuming you're not up to building your own (which isn't rocket science).
The new Dell XPS 27 looks like an interesting iMac competitor (at least in the UHD "4k" version) - its not cheap, just a shade less than the iMac for comparable specs, M485X graphics (c.f. M300X series in the iMac) good connectivity (2xTB3/USB-C, bunch of USB3, DisplayPort Ethernet, SD card) which could turn out to a be
much more practical setup if the new iMac goes all-USBC, but the kicker is that the back comes off with a screwdriver & you have RAM slots, a standard M.2 SSD blade and 2 standard HD bays...