IMHO, Columbia really don't have anything in the lineup to replace a Resurgence or Moementum at this point. A Full Swing with an early rolling smoother backend layout might do the job for the Resurgence and the same goes with the Bedlam for the Momentum. Based on what I've seen about the ball, the Full Swing and Bedlam are designed for significantly more length and backend than the Resurgence and Momentum were. You might want to take a look at the Noize as an alternative for the Resurgence because it's got the same cover. I've thown a Cool Noize, and I believe this would be my choice to replace the Rival. The cover is a pearl version of the cover used on the Rival and even with the different core, the ball roll for me is similar in the midlane and backend to the Rival. It has a little more length than the Rival, but I'm not sure that's a bad thing.