Stick with 4.1, I doubt there will ever be any reason to go above 4.1. 4.1 does everything 4.2/4.3 does without the anti homebrew supplied by 4.2/4.3. You can update all your ios and channels with MMM, wii-mod, modmii, or dop-mii. Just update what you like to update yourself with one of those and never update from Nintendo. Also never update your system ios60 as the latest updated version is a useless stub. Never install stub ios files, installing a stub system ios will brick your wii. 4.0/4.1 runs on ios60-v6174 and ios60-v6400 will brick sm 4.0/4.1. When updating channels you also need to update the ios that the channel runs on, just don't fork ios30/50/60/70/80 as these are the most common system ios, no stubs.