I would start by answering the questions "who will be working on this bow?" New? Warranty important to you? If you don't have a press/tools (you have a lot more leeway if you have tools), you might need to get a brand that is supported by your local shop? I would them go shoot every bow that I could where you shop. There are a lot of factors in deciding which bow to buy, new/used is a very important decision, if primarily hunting or a short draw you might want to go shorter ATA and a speedier bow which tend to be over sprung. If it will me a multipurpose (hunting/target/3D) bow you might want to go longer ATA then it matters less IMO. Look at the PSE Evolve 35, it is a more conventional design and everybody is GA-GA over, this bow is all about the Evolve cam design. I am more into accuracy and the Prime Centergy Hybrid is my favorite this year. (I have a 31 3/8" draw and that effects my decisions) I like the balance and hold of the Centergy Hybrid.