The answer to your question about noticing a difference in a 10+ year bow is yes. I will say that the jumps in speed are reaching their limitations unless they start doing something very radical in design. The changes in compound bows over the last 5 years have been minor and are based on comfort, noise, draw cycles while keeping up speed. I personally just purchased a new bow this past weekend. My other bow is 5 years old. I am not brand loyal but I tend to support companies that support my personal views. I am not going to name drop bow brands here, but to make my decision I shot several models from several different manufactures. There was one particular manufacture that I eliminated based on personal dealings back when I was a archery shop owner. I shot so many bows and traveled to several different dealers before making my decision. Truthfully if you blindfolded me and gave me each bow I could not tell you which one was which. I started nit picking them based on what I believed could be durability issues in the back country and even that was tough. At the end of the day I went with the one I had ruled out because of the personal dealings that I had with their dealer rep! Guess what I am saying is go shoot them, take what others say as personal opinion, don't let anyone pressure you into buying something, and have fun doing it. I would suggest doing the same thing on accessories. I tend to look at durability and simplicity which in my opinion = reliability.