I know there are several threads floating around debating which iPad is better, but I haven't had time to read through each and every post. Can someone tell me if there are any screen issues with either of these? I heard the Air had issues with a vertical line on the left side, and I've heard the mini has issues with color gamut and yellowing? Are these issues resolved if I were to order one today? Lastly, I'm leaning towards the Air. I had a 1st gen mini, and loved the size, but not the screen so much. I think I'm ready to go back to the bigger screen now. Any help or advice would be appreciated. Thanks!