This was a simple office PC put together for a cousin of mine for... you guessed it, his office. £500 was his budget for the computer, he only needed something relatively simple, but something that would at least be faster and more reliable for what little £500 would get you in a prebuilt.
The case is small and robust, with a very premium feel to it all. Under load I haven't even heard the PSU make any noise, and the mesh front means that despite densely packed hardware, the CPU has plenty of room to breathe.
At the time the SATA SSD was £10 cheaper than it's M.2 equivalent so I made that decision as to remain within budget. I went with the fastest RAM in the fastest configuration - dual channel + 2400MHz - as to get the most out of the i3, since 8GB is plenty for him.
Any questions, let me know.