4) Segmented downloading... Does anyone know if LeechGet has this last feature? Didn't see it in the screen shots.

Actually, I think you did. The picture of the download window shows several bars of different colors, which would seem to be indicating segments. But LeechGet does not call it segmented downloading. The paragraph that goes with the screenshot states "Downloads can be splitted up in up to 99 so-called Tasks. Each Task receives a part of the entire download..." etc.

I haven't had a chance to try it out myself yet. But it looks like it will be able to do everything I might want it to.