Steve,
Glad you found speakers that work for you. DSP is actually a broad term. Most good DSP units have many features. They can be used to simply perform just the crossover functions, to complex filtering, to advanced room correction. Before DSP many argued that, done correctly, active crossovers with multi amps yielded the best performance. Others will argue those system are too complicated and difficult to get to work properly. Many will argue that passive crossovers are the only way to go. Passive, active and DSP all have their pros and cons. One of the pros of active and DSP systems is that the drivers are usually directly coupled to the amplifier outputs. There can be substantial losses through passive components. Even with good passive and active crossovers the filters are rather coarse when compared to good DSP. Then there are phase issues...
Sorry for being long winded but my guess is that you like the DSP speakers because the manufacture did their homework and built speakers with not only a good frequency response but also with good phase response, good power response and decent off axis response. The drivers being directly coupled to the amps typically yields a more dynamic presentation. Great mid-range dynamics help make a system sound closer to real music. Good dealer go to great lengths to set up system to show off their products. They usually have lots of equipment and accessories at their disposal. Most of us don't have that luxury.
Do your new DSP controlled speakers have room correction capabilities? Have you tried using it? Being a designer /manufacturer of DSP controlled speakers with room correction capabilities I'm curious of what your impressions are of correction vs no-correction.