I loved Zalman's HD160XT when I got a chance to look at it in early 2007. It was hard for me to imagine that they could improve on it very much. Well, they found a way. Actually a couple of ways. I like the reorganized front panel for the improved access to the control buttons and I/O features. I also think that the change to the iMON software is an improvement, not only for its functionality, but also for the future support and updates that will be available from SoundGraph. Losing fan control and temperature monitoring is a bit of a disappointment, but the fans in the HD160XT Plus are very quiet (at 5V) anyway, and looking back, I don't think I used the temp monitor that much either.