Dont rush in with a scope yet -- come down Saturday - usually various Big Nikko Mk I, 2 and 3 there and a couple of T50. There may be Tasco Custom shop 8-40 also ( which I think is for sale). The owners will be happy to let you look through them so you can see the difference. May be a Bushnel 8-32*40 to see as well.
I made the classic mistake when starting of buying a cheap high mag scope thinking it would be ok -- I sold it after 4 months and bought a second hand Deben 10-50*56 ( very underarated and getting rare ) before moving on to a Big Nikko. A decent second hand scope will sell on if required with out losing too much money.