FYI...Pro Kennex makes some pretty bold claims that their Kinetic technology is the only one proven by independent scientific research to reduce shock and vibration. Here's a video that explains it:
I know you have to take the information with a grain of salt when you hear it from a Pro Kennex rep, but the difference I noticed between the Ki 5x and the Babolat APDGT over a period of a few weeks was astounding.
Also, this is not meant to take away from the other racquets I mentioned in my previous post, which actually felt more comfortable than the Ki 5x. I probably would have noticed big improvements in my elbow with any of those racquets.