Marantz Mods?

I have a Marantz Integrated amp 1180DC that I was thinking could be a good choice to bring into the 21st century by upgraging or modding with new caps and IEC receptable (for replaceable power cord) and new speaker terminals (from spring loaded insert wire to Cardas binding posts). It hasn't been in use for a bit of time but is in good shape and is like a battleship for weight!
2 questions now; 1) Is there someone who mods them? or 2) should it be be left origional? Thanks for your opinions