Bokfudo: My personal experience (from memory);
Blue Dots: Distortion in the upper mid-range and lower treble.
Blu-Tak: Better than the Blue Dots but made the mid-range leaner and seemed to roll off the high end.
Herbies Big Fat Dots: The most balanced and satisfying presentation compared to the others. The Fat Dots I used were the original formulation which has changed. I would assume the newer Fat Dots are an improvement of some sort but I haven't had an opportunity to compare them to the originals. I'd say give them a try. You can always return them if you don't like them.
Good luck in your quest.
Blue Dots: Distortion in the upper mid-range and lower treble.
Blu-Tak: Better than the Blue Dots but made the mid-range leaner and seemed to roll off the high end.
Herbies Big Fat Dots: The most balanced and satisfying presentation compared to the others. The Fat Dots I used were the original formulation which has changed. I would assume the newer Fat Dots are an improvement of some sort but I haven't had an opportunity to compare them to the originals. I'd say give them a try. You can always return them if you don't like them.
Good luck in your quest.