Rotosounds with the .090 E string is what my Ric 4003 wore. Killer tone, super fast to play.... I loved the match.
I stopped using Rotosounds in the late 80s though, thye had QC issues for a while. I still use Stainless rounds (nickel feels slimey and elixers feel like they are dipped in wax

)... I much prefer DR Fat beams (or High beams). I also like SIT Rock Bright Steels and D'Addario Pro Steels.