Thanks a lot for all your replies,they were all very helpful!
I couldn't deal with the Spiro G any longer so I put on the other great string besides Spiros...gut. I had a NOS Eudoxa plain G (yes,they used to make them like that before 30 years or something) in my string drawer and I used that . Of course it sounds great...however it is very different from the Spiro D. So I tried a few things and ended up with a Corelli 370m D string which sounds ok but is too thin. However , as soon as the Spiro D left the bass the sound opened up .It seems that my bass likes something lighter than Spiros for the top two strings. The E and A sound and feel great.
Here is a soundclip ...(I think I uploaded it by accident twice ,maybe a moderator can erase one of the two.Also my phone starts ringing at some point...hahha sorry for that!)