Which one would be better? I know that 3.1.3 is better with performance, but 4.2.1 has more of an app selection. I'm not sure which to put on it. I do have blobs to go back to 3.1.3 if I don't like 4.2.1, and I have blobs in between these two iOS's (like 4.0, 4.0.2, 4.1,) so if one of those would be better also, I could do that, too. I'm just wondering what would be better in the long run since it's an older model. Thanks!