Ask this question and you'll get many different answers as each of us think what we shoot is the best, that's why we have them. Can you use a scope? a Sabot? or do you have to use open sight's, there's so many good choices for your exact need.
Personally I like the CVA ACCURA, for the money it has been far the best and most accurate ML I have ever shot. A year or so back you could have picked one up for $250 and added a Leupold Ultimate Slam ML Scope to it and for your $500 you would have had a nice set up.
You cant go wrong buying a CVA or TC.
(BP)