Good luck in finding an RS that ticks all the boxes for you.
I spent a good couple of months at the end of last year looking for one that fitted the bill. Be patient and the right one will come along.
As for colour, it’s all personal preference. As mentioned there’s no mistaking nitrous for an ST etc however they are most common. Probably because it was launch colour, on all the posters, adverts, journalist reviews etc. It is a stunning colour. Can’t comment on the rest. I like a loud colour, but some folks like a more subtle approach.
I found when searching for mines that it was difficult to get actual invoices or documents showing the recall work being done. Seems ford didn’t issue anything in the majority of cases. You just need to check that the vehicle you are buying has no outstanding recalls required.
Like buying any car your best having 2 figures in mind. What you are happy paying to get into one and best always keeping a little on reserve for any unexpected costs, putting minor defects right or as a little extra you can put towards a car that is perfect for you just to stretch the budget a little. That’s the way I do it.
Again all the best finding an RS. You will get plenty help and advice on here.