I've tried a search, but can't seem to find these answers: 1. Are there any major differences between HD3 & HD5 (apart from battery life)? 2. Is the old gripe regarding conversion to ATRAC? software related rather than hardware related (therefore, if you use SS3.1 with an HD3 can you convert straight to mp3)? 3. I assume conversion to mp3 means that you can upload them from your portable to a laptop. Can anyone confirm? 4. Can you drag and drop music files (using explorer) with the HD3 and HD5? Thanks guys. I'm leaning heavily towards the Sony, but like the looks of the HD3 compared with HD5. These answers will help the decision making.