In my opinion Bushnell Trophy is the best bang for the Buck. I have a Baner Dusk to Dawn on my ML and it works great Year after year. It has performed perfectly I only shoot out to 100 yds so the 1.5 X 4.5 works well for me. I have a Trophy on my slug gun and on my .308 and they have worked perfectly also. I agree Leuold is a better Scope but the cost is about 2 to 4 times that of a Bushnell ( I bought a Bushnell Trophy 3X9 at the Cabelas Store in PA last year for $75 couldnt pass it up) I am getting a new Muzzle loader this spring (waiting for the new Knight) and I will probably go with a Leupold just because I have the money to buy a better one. The Luepold sportsman is a real nice scope for a ML for about $180
Best scope for around $100 bucks =Busnell Trophy
If you can afford better=Leupold Sportsman $200
THE BEST Leupold VX-III for $400 (in my opinion the best but very expensive)

I can't comment on any other brands becaues I don't own or have not used any others(other than Tasco and I wont even bother)