I want to buy an ipod touch for my sons birthday. I am not sure what size to get him and what case and accessories to get him. I have been looking at www.ipodtouch-review.com and I got a little distracted looking at how the touch screen works. But I found a few good cases. what are the best options for the cases and screens and what size should I get him? www.ipodtouch-review.com has some good cases but I cant decide. advice please.