Hi, yesterday it was released PeaZip 3.8, that adds full support for WIM and XZ archives.
Linux versions of the software are available at
http://www.peazip.org/peazip-linux.html
Generic packages (not targeted to a specific Linux distribution / version) are available in DEB, RPM and TGZ format, both compiled for GTK2 widgetset (recommended) and for Qt.
It is also posible to use the portable version for Linux, that does not need to be installed.