Price is the deciding factor, IMO. I have used practically most of the DSPs that have graced the face of the earth, and remember specifically the surprise when moving from an Ashly to a dbx 260. Night and day using the JBL presets. Time marches on and newer presets prevail, still better, then oops, I bought a 480. The DSP was a joy to work with, however, JBL no longer had recent presets for the now discontinued DSP and I was left on my own. Transferring the 260's settings to the 480 was a giant pita, and after the transfer an additional 2 weeks of work with calls to both JBL and dbx resulted in a "usable" system.
Time marches on again, and my obsession with quality sound led to the purchase of a dbx 4800. Not for the faint of heart or weak of wallet, but by far one of the best DSPs on the planet. The sound is incredible, the support is incredible, the options are second to none. The difference between the 260 and the 4800??? Night and day, the 4800 walks away from the 260. The difference in manufacturer supplied presets?? Again, night and day with the 4800 addressing option the 260 doesn't have. So, price makes a difference, manufacturer makes a difference, and the presets make up the rest.