Thanks very much Raven61 - I'm doing my research at the moment, and getting to grips with it all.
Thanks very much also to mikeeb and tedmus - I will let the advice 'sink in' and have a good look at what's available.
All your advice is much appreciated. I am looking forward to getting a box, and having more tv to choose from!
Not a problem gep

Ravens generous offer is one you should take up if you get stuck
The interface is exactly the same across all platforms (android/windows/apple)
Stick with your PC for now because you already have it
When you are comfortable with the interface then decide if you want to fork out for a box or firestick
I watch full box sets at once
Person of interest is one of my favs
Happy viewing