The KDC-X702 has plenty of DSP capability for the price. It does lack compared to the DEH-80PRS (king of "budget" DSP equipped head units) in only having a mono EQ and lacking bandpass crossovers. Obviously, an outboard DSP would easily trump both.

That being said, if you plan to "keep it simple" and run passive the Kenwood isn't a bad choice. The 13 band paragraphic EQ with low shelf, L/R high shelf for tweeters and "sound effects" coupled with time alignment should help take a basic passive setup to the next level.