If you're looking to buy an iPod, you might be surprised to find that there is a choice of five different iPod models to choose from: iPod shuffle, iPod nano, budget iPod touch, iPod classic and the full-featured iPod touch. Which should you buy? Here, we help you decide.Related StoriesNew iPad 5 release date, rumours and leaked imagesLow-cost iPhone Lite release date, rumours and leaked images