I haven't read the whole thread, so I apologize if this has already been said, but with a few titles like these, a 7800 mini with HDMI or a Retron77-like machine would be a no brainer.
I have this game on Steam and I can't wait for the 7800 version.
As an aside, I'd kill for a Steam version of Zaku. I have the Lynx cart but my old Lynx screen is so faded.