I'm assuming that you are using a windows pc. The list of software that you have should pretty much cover everything. I would also recommend
mobi2imp from nrapello also available on the forums here.
I have started buying mostly mobipocket format books and using mobi2oeb that is included with Calibre to explode the mobi file and get the html and an opf file that can be used to create an imp or just using mobi2imp to create an imp directly. I've run into a few lit books that just would not convert properly. I haven't run into that problem with the mobi files. The html from a mobi tends to be a little cleaner and easier to modify if need be than that from a lit file.