We tested the new Irobot Roomb i7 with the self emptying "Clean Base" and here are the results! Roomba i7 on Ebay: https://rover.ebay.com/rover/1/711-53200-19255-0/1?icep_id=114&ipn=icep&toolid=20004&campid=5337945138&mpre=https://www.ebay.com/sch/i.html?_from=R40&_trksid=m570.l1313&_nkw=roomba+i7%2B&_sacat=0 The best upgrade in our opinion is the automatic dirt disposal system which is a large charging dock which has a bag inside that pairs with the dust bin on the robot whenever it docks. When