I never felt like my Wii would break, but that is also because I never play it. As others have said, the Wii seems fun when you are about to buy it, but then you realize it isn't that fun.
I would consider a 360. The game selection is very similar to that of the PS3, and the 360 offers a robust online experience. Now you might be worried about hardware issues, but I really think those are overstated at this point. If you are really worried, buy a warranty from Best Buy, I hear those are great.