[trux]

$650 is about €440, which is actually cheaper than Mosquito a short time ago (I think I paid more for mine a few years ago). I believe in a few months you'll be able to get a slightly better deal on it. And D4 is more of a new Mosquito than D3, because it does also air and nitrox tables for scuba diving, so it is designed more for this part of the market - freedivers, spearos and snorkelers who also occasionally scuba dive, and that's probably a rather big group.