Best advice, play with all of the softwares (you can download minidsp and helix software without having the devices). See which one you can use the best. Then buy that one.
I do not see some options in the screen shot for the audio dynamics (Input eq, Group time delay, all pass filters, some of the center channel algorithms, differential rear fill, etc) that you can use in the minidsp and helix options. Some of the minidsp options do require software upgrades, but these are relatively cheap.