Again I thank you for the time and effort that you have put into your detailed reply and I couldn't agree more, as I could pull off wearing a rep Rolex and not be questioned about it, I could not get away with for 1 second wearing a UN £450,000 watch.
My only reason for asking if they do a rep of that piece is in my opinion the UN ATG is the most amazing and detailed timepiece you could wear on your wrist.
But back to my original question, I have followed your advise, done my homework and research and am going to settle on a noob V5 sub-c from Torobravo which has great reviews on here around its service and quality of watches.
Thanks again for your time (no pun intended) and very informative replies.