I owned Maggie 1.7i's and just received my new X5's. I'm still breaking them in but the dynamics and bass are better. The AMT driver is very detailed, yet smooth. The DSP and N Core amp handling the bass are a big plus as now my amps simply have to handle from 90 hertz and up. Very nice upgrade.
For those considering EP, remember that these speakers are basically unchanged since Clayton sold to Underwood in 2009. Clayton has gone through 4 generations of speakers and changes since then. Also, I see people recommending the m3 turbos and masters. Those have been replaced by the M3 and M5 Sapphires. I heard the M3's at a show last fall and they are an excellent speaker (one of the best rooms in the show) with the Linear Tube Audio ZOTL10, Lampizator Amber 3, and wired with Anticables. The entire system was going for $9999. Incredible value.