OK, sorry for the delay. I think I have a solution that I am confident about having had much input from everyone here and on the phone, which I thank you all kindly for. Your all a massive knowledgebase and some have a scary amount of computer savvy in their minds.

Good power supply - Seasonic or Corshair Golden Plate / Gold rated - clean energy and wattage
Something about 750 watts - 120 watts
Semi modular to minimise cables

Asus / MSI / Gigabyt / Asrock motherboard, maybe Skylake 4GHz i7
Probably no need to overclock as the difference is small? [little forgot that bit], something to do with overclocked versions are just chips with no defects but essentially they are the same. But will still probably cool with L80 coolest autocooler or Noctua tower block fan cooler. If choose to overclock, 6300 K-version - DO NOT use stock cooler that come with the CPU
Will probably get a kit so it's already assembled and just need to install

DDR4 RAM - apparently cruicial.com.co.uk do good cheap RAM.
2133MHz - not overclocked RAM

500GB SSD hard drive to boot system and for operations but a couple of good 1TB HHDs for storing data

if going with Linux use Open Zeus [preferred] / Ubuntu / Lint Linux / Game2

So, this setup was detailed with the gracious 30mins chat on the phone offered by a user here - thank you.

I will be out of the country in a little over a week for a total of three months, so unfortunately will not have time or need for this until I return. But would like to continue discussing it and researching while away, so if anyone has anything to add please go ahead.