I shoot a PSE Diamondback II single cam set at 63 pounds.  Newer bows have really come a long way from older two wheel round compounds.  
My suggestion to you is get a newer bow from an archery shop that will be set up for you properly for your strenth and size.  Buy from a shop that has a place you can try the bows and take their advice to heart. You will be shooting apples consistantly at 20 yards.  If you get a make-shift used bow that kind of fits you, your shooting will never be what it could be.
Absolute musts (for me) in accessories are fibre optic sights, a peep sight, and a good mechanical release.  Originally years ago, I shot with fingers and front sights only quite well.  When I included a rear peep and mechanical release, my shooting improved dramatically!
I have been around bows all my life.  Some will sing the virtues of traditional bows and I still enjoy shooting them at targets for fun.  However, if you plan to hunt and have never picked up a bow, a traditional bow wouldn't be my choice for you.  It's kind of like learning to be a good baseball pitcher.  You may never have the aptitude to be great at it.  However in comparison, newer compounds take most of the guess work out of shooting accurately right from the start.