Planning to upgrade

Hey guys! I have a 55 gallon saltwater tank going for about a year and a half now and have decided its time to upgrade. Currently I have a 55 gallon with two aqueon quiet flow 55/75 filters, a large marineland power head and a standard heater. I would live to upgrade to either a 150-210 gallon tank. This will be a slow process and would like to start with the filter and a protein skimmer and then move onto the tank. So what do you guys suggest is the best filtration and protein skimmers? I appreciate all the input I can get before making any purchases!!!

I have been doing some research and have found the TOM Aquarium RP3 Plus (Rapids Pro Filter with Auto Fill System, 700gph pump) and then Eshopps WD-300CS, and the CPR SYS 3000 Wet/Dry Filter Package which still doesn't come with a protein skimmer. Any suggestions on which is the best filter and a good protein skimmer. Please Help Me!!!