Strings for fretless "MWAH" nirvana

[Jools4001]

Can anybody recommend strings for the most effortless 'mwah' on my 5 string fretless?

I'm currently using 40, 60, 80, 100, 130 Elixirs (at least I think that's the guage - can't remember really) and they feel a little lifeless even though they're only a few weeks old. I'm happy with roundwounds or groundwounds, but no flats because they don't give the nice pingy harmonics that I like.

I suspect that going to a lighter guage and hence a slightly more rubbery, flexible tension might also help...but what do I know.

[Jazz Ad]

As long as they're pretty new, any brand of roundwounds will do.
Mwah comes much more from the fingers than the strings IMHO.

[McDreads]

The ' "MWAH" nirvana' is more in the fingers and the setup of the bass (the lower, the more "MWAH" nirvana) than in the strings used. My bass got all the "MWAH" I need (and all the nice pingy harmonics) with a low setup with TI Jazz flats.