What would be a nice evergreen tree hedge that would get tall and grow quickly?
I would talk anyone out of Leylandi although it grows fast about three feet or just under a meter in a season the cause more arguments with neighbours. And as you trim them each year the inner dead wood appears more so your hedge gets wider after each cutting or trimming , once you go into the dead wood it will not recover, and you will simply have a brown hedge looking at you. A good box hedge is the better way to go and you can take many cuttings to form more hedge round the house, trimming is easy, at least this is what I found while working in a large estate. good luck what ever you do but consider your neighbours if you have any,with the height, and keep out of arguments.
