Remember, a bow is much more efficient and quieter when set toward the top end of it's range. That would be a 60-70 works best set at 70, not down near 60. I've always shot 70-80 for years. My last two bows I dropped down to 60-70 and peg them out at or near the top end. Unless you're some abnormal type dude, I would think you'd have a hard time if your just beginning to shoot a bow. It uses muscles most normal people don't exercise. If you have to grunt and groan or point the bow to the sky to pull it, well it's too much for you. Not having experience with a bow it's hard to use rules like sit on the floor and pull the bow straight in front of you. With that rule most newbies would probably have to start at 40 pounds. LOL Honestly, that rule or suggestion was meant for determining hunting weights for experienced archers. You're neither. You're going to have some trouble in the beginning.... but will work threw the beginning phase quite smoothly and quickly. I would say go with the 50-60 in the beginning. Most bows it's not a big deal to change modules, limbs etc if you decided to later on. My thoughts, you'll buy a bow, shoot it a couple years and be ready to move up. I think most would agree that a 60-70 pound bow gives you lots more options(like mechanical broadheads) heavier arrows etc. People talk of shooting a bow at 60 getting the same when it's set at 70 with the same arrow. I find that hard to believe. What probably is happening is they've pushed the envelope on the arrow at the higher weights and have thrown the whole system out of tune so to speak. There is a trade off with speed, lighter arrows, draw length and all that. Knowing bows are more efficient near the top end I'd say they've passed the optimum set up for an arrow when they get the same at 10 pound spreads.