What is the most featureful dual pane GUI file manager on Linux, akin to Directory Opus?
I use Thunar or just the terminal for quick tasks but I also have to work with very large image libraries often where those just don't cut it, and I want a big bloated beautiful dual pane filemanager with shit like Flat View (recursively flattens all subdirectories so every file is shown in a single lister), persisted per-directory sort/grouping/thumbnail size/column layout rules, bulk rename tools, the ability to sync both panes' trees, and so forth.
DOpus is basically a huge, heavy, scriptable swiss army knife to do anything you'd ever need to do with files on Windows, which I suppose is not very Unix paradigm-y, but it's the literally the only piece of software I miss since switching...