I use Fat Beams on all of my basses except for my fretless which has Sunbeams. I think I tried Hi Beams once and I thought they were too bright. I've used RotoSound Swing Bass 66. I feel like Fat Beams are warmer and last a helluva lot longer - They typically last me 3 - 4 month. DR marketing talks about compression winding on a round core feeling more flexible. Pure Blues are Nickel on a round core. Fat Beams are SS on a round core. I have a very mid-forward tone and I get a lot of articulation and punch using Fat Beams -- give 'em a try. YMMV.