Hey 1coolcat,The consensuses seems to one of Power vs. Shot Cycle & Spring Longevity. My interpretation of a consensuses was determined looking at After-Market spring kits made for various manufacturers and many airgun models - Not just the AA TX200: 1) Vortek kits offer more power, a smoother shot cycle, but reduced spring longevity vs. OEM.2) James Maccari kits offer less power, peerless shot cycle and excellent spring longevity vs. OEM.Your decision should be based on what is the most important criteria for YOUR shooting style.My Two Cents .............. Kirk