That is VERY correct about quiet being better than fast. There is NO bow that comes close to shooting an arrow the speed of sound, so I will take quiet(Heavy) every time. Don't worry about which arrow will go through a shoulder blade, if you are hitting the shoulder blade, your arrow wasn't in the right spot anyway. Check out some good cutaway photos, the shoulder blade is WAY higher and farther forward than most people think. I was in Africa a couple years ago and my young PH kept trying to talk me into shooting a blue wildebeest, I told him I had NO intention of shooting one, since I think they are kind of ugly and for the $800 trophy, there were several other species that I DID want. Well he persisted FOR DAYS, finally, I said "Chris, why do you want me to shoot a wildebeest?", he said, "Rick, I've had FIVE bowhunters shoot one before you and we didn't recover ANY of them" so now I'm thinking I REALLY don't want to shoot an $800 dollar animal that nobody recovers. Well he sorta put me into the position where I HAD to shoot one and I thought to myself, I'm not taking ANY chances I'm going for a heart shot! That arrow was nearly perfect, right in the triangle, I thought "YES", Chris said, "don't worry, we MIGHT find it!" We did, it ran about a 100 yards and died from a 700 grain arrow through the heart. I asked Chris after why he was so down when I shot it, he said,"ALL FIVE BOWHUNTERS before you were shooting HEAVY compounds, but LIGHT 350-400 grain arrows and ALL of them got this much(he held his thumb and forefinger about 4 inches apart) penetration in the same spot that you shot all the way through! He talked about 700 grain arrows being the ticket every day after that!