I'm currently on 5.3.2 I'm very confused on what firmware i should be on. I've read that for IOSU, i should be on 5.5.1 before it's too late. But, some say there are benefits for 5.3.2? I just entered the Wii U scene, after not touching it for a while... So should i stay on 5.3.2 or update to 5.5.1?