Jax2, I have not heard the Rhythm Prism's, but Duke designed them with the Jazz Module in mind and likens their sound to them. I own the Jazz Module and have been thrilled with them. Problem is Duke can no longer get the TAD-1101 drivers, so for others the Rhythm Prisms may be a great alternative, and at a lower price point.
I haven't heard the Jazz Modules, but heard the Dreammakers and was pretty floored by the sound and scale. Duke designs some nice kit. So if he can't get the TAD-1101 drivers does that mean the Jazz and Dreammaker will be discontinued?
Yet one more good direction to check into is Coincident floorstanders, which I use currently. You might want to mention which amp your using, the size of your room and the kinds of music you listen to. All those things may help narrow down the choices and get you some more input. If you go to RMAF you'll probably be able to hear many of these options.