Hi there! I am currently looking for a TOTO skirted toilet that is elongated. From what I understand, my options are the Aquia IV, Nexus, Carlyle II and the Vespin? Looking around I can find them for around $400-$600. Just trying to get the most bang for my buck. I want something that's elongated, tornado flush and with cefiontech. Looking to add the Washlet from costco right now so I'm not too sure if that would influence my choice.