Sorry, I don’t think that this is possible at all. Any wxPython controls will have to be around the Panda view, not inside. You can embed a Panda window inside a wxPython window, though, but I don’t think you can overlay wxPython widgets on top of the Panda window.
You can’t overly wx items onto a Panda window, even in a Panda window that you embed within a wx frame. The 3-D rendering hardware is fundamentally different from the 2-D support provided by wx, sorry.
DGUI is not that bad. It has its quirks, but once you get to know it -the sky is the limit. I can’t imagine any type of gui that can’t be made with DirectGUI (in the worst case scenario it could be slow with 200+ elements).