Deffinetly not getting a cable attackment to a powerrack now as it taqke up to much room and is pretty useless.
So its either the MMPR you suggested or them Powertec rack, the powertec rack is shorted by almost 20cm in length but im not sure about powertecs dip attackment cause they taper inwards. wouldnt this be kind of bad on the wrists.
Also powertec costs $1500 with 145kg weights, olympic barbell and some bench worth like $400, to be honest i dont need a bench worth that much its just a waste of money