I also want to get DE II, one day. For now, I think I'll follow the advice here and nab a copy of the import version to hold me over, but I'd love to get the US version too. It's something I've wanted ever since it was featured in Turboplay/Turboforce/DuoWorld (whichever it was at the time).
More importantly though, DE 1 is something I need to reacquire, it's one the US Hu-Cards I used to have as a kid, but I don't anymore. My collection is mostly CD/SCD games right now, but luckily I had the sense to keep a few of my other good games like Blazing Lazers and Parasol Stars.