I've been a DR high beam fanatic for about the last 5 years. They just have a great feel under my fingers and respond *just* the way I'd like them to. When I want them to bark they bark, when I want them to growl they growl, and when I want sweet warmth, they are there for me too. Then, once they break in, the highs back off and you're left with an amazingly growly string that lasts for months, and always with that same great feel. Now, out of curiosity I've been trying fat beams and sun beams (the strange 1st cousins I spoke of) and found them both to be ... strange. The fat beams are great when you put them on, very very snappy and crisp, but when they wear in they get thunky instead of growly especially on the low strings. And the sunbeams are just too gushy for me, they have too little attack and impact, even when brand new. Whats wierd is that I found rotosound swing bass 66 to be closer to a high beam than either of the strange beams. So, I just really hope that DR NEVER EVER changes the formulation high beams. My $0.02.