@ntx if I were getting a new 200, I would definitely go with the 5.3 over the 5.7. My first choice, if I had the money, would be the 6.2 even though I don't jump. The 5.7 is darn good, but it's old technology with mixed metals. PCM and Nautique historically have been VERY GOOD about having a new product ready before it's released. I wouldn't hesitate a moment on either the 5.3 or the 6.2. One thing I like about the 6.2 over the old 6.0 is the cooling system. If I interpret the PCM website correctly, the 6.2 (and the 5.3) have full fresh water cooling. No antifreeze. The antifreeze system on the 6.0's has not been a problem for anyone that I've heard of, but it's just one more thing you have to check and maintain. Others on this forum no doubt know more than I.
If the 5.3 has the torque and HP it's supposed to have, any hard pulls after the second wake (in slalom) is likely a ZO problem, not a 5.3 problem. I don't know if all of the new single puck issues have been resolved. I'm sure they will be though.