Okay, so this won't be for everyone, although I think it's worth a look if you're not wanting to build your own system and the monitor looks pretty decent too. You can upgrade it easy enough, as it can hold full sized GPUS (as opposed to the mobile GPUs)

You can connect other devices to it and use it as a monitor, if you feel the need.
It also has "RealSense 3D Camera" Which apparently lets you use facial expressions and hand gestures as a control (Not something I've seen/experienced personally, but there ya go)

It DOES have an optical drive, if you still use one... I normally wouldn't be too crazy about anything like this, but for someone that doesn't want to build their own system, it's pretty cool.

I totally get why folk build their own, It's exactly what I do. Genuinly like the look of this though.

• Processor: Intel Core i5-6400 Processor ( 2.70GHz 2133MHz 6MB )
• Operating System: Windows 10 Home 64
• Display Type: 27"QHD 2560 x 1440
• Memory: 16.0GB PC4-17000 DDR4 2133MHz (2 x 8.0GB)
• Hard Drive: 128GB SSD PCIe+2TB 7200 rpm
• Optical Drive: DVD-RW
• Warranty: One year Depot or Carry-in
• Graphics: NVIDIA GeForce GTX 1070 8GB GDDR5