I agree, homebrewing a Wii is so easy that I think I could do it in my sleep at this point. If anyone is debating between one or the other, Wii is the way to go you're essentially getting two consoles in one (and there are even emulators/vc for almost every console that comes before them).

That being said, I just have to admire the work that people are putting in to the GameCube after all these years. There's something really pleasing to me about its form factor and its simplicity compared to the Wii. This channel has several other showcases like this one if that sounds interesting!