I suggest you ask at your local club before investing in anything, clubs are usually very friendly places with helpful folk who are happy to let you have a look through scopes to give you an idea of what you might want that way it could stop you buying something you don't want. (this means rifles as well as scopes and most other kit)
At our club we try to encourage club members to give some of their time and help other members.
My tuppence worth for what its worth
Happy HFTing its great fun