I swear by Hi-Beams as well. I used to rely on Rotosounds until I experimented with the Hi-Beams on a MusicMan clone and fell in love with them.
For my most recent gig I stripped my Jazz bass of a relatively fresh set of Rotos and replaced them with the Hi-Beams - I have never had that many people come up to me afterwards to compliment my sound before. Thunderously sharp sound yet buttery-smooth at the same time.
Have you tried the SS Lo-Riders? To my ears and hands, they seem to be the "like Rotos, only better" strings.
Just to share my joy here is a pic.