I've got two Rockbass 5ers (one active, one passive) with D'Addario Chromes and love them. Their sound is bright, even the B string (when I finally managed to fit it into the effing hole in the bridge, by stripping it of the silk), even after several months of use.
They are low tension - which suits my hands fine - but not as low tension as Thomastik-Infeld strings, for instance. Thumbs up. Incidentally, if you shop around you may find them slightly cheaper than £45 I think.