Why it probably makes sense to buy the 2GB model:
The Nano ships in two capacities, 2GB and 4GB. I went for the 2GB because 4GB isn't anywhere near enough for me to store all my music, and besides that's what my 20GB iPod is for - so my rationale is that you might as well save 40 [pounds], since you're going to have to pick and choose your tracks no matter which capacity you go with. Apple reckons that the 2GB Nano will store 500 songs, with the 4GB holding 1000. Of course, how much you actually get onto any device depends on the bit rate at which you encode your music and the codec you use. Like all iPods, the Nano supports two codecs AAC, MP3, AIFF, WAV, Apple Lossless and Audible.Alas, we're on the zero gadget growth rule at our house. In order to buy the Nano, we have to find something to get rid of. That's not as easy as it sounds -- I don't have any gadgets that I don't rely on. I'm not ready to give up a digital camera in order to add a Nano.