Since this thread is quite old, I thought that I'd just offer a short comment to address something that I've noticed a conspicuously absent from the thread (at least from what I've read).
ANY DR string (IMO) could NOT possibly be a bad choice, for at least Bass Players. I have used multiple versions on both Acoustics & Electrics, Basses, 6 strings, 7 strings & acoustics (and lately a 12 string acoustic). All seem to have serious tonal advantages. Wonderful stings, If it were not for their price I would use them all the time. With the number of times I play per week, I have to change strings regularly & often.
Here's my thing with the Coated DR's (this applies to literally ALL versions [even the clear]), they quickly loose the adhesive properties and start to "Flake" off the metal surface. This seems to always be where I play the hardest & make the most consistent contact. Unlike LaBella's (and others) for example, which use a micro-fine nylon ribbon that is wrapped around the exterior surface, the DR's COAT (and MOST others) them. Now this is more a "cosmetic" issue than one that effects playability, but, I have noticed this is pretty consistent theme with DR's (and other "coated") stings. Just slightly unsightly for gigs. I've noticed this the most with the "Black Beauties" & "Red Dragons". Especially, when a pick is used.
Just something to think about. I'm no Chemist, however, I would think if they were to create a less brittle coating material, that this would greatly increase their lifetime. Seems that I replace them, almost, as often as untreated strings. Not because they are loosing tone, but, for the simple fact that they look horrible on stage. So, the "Cool Factory" is NOT offset by their longevity ~vs~ cost.
I sure hope this helps some players out there. A $30 set of strings that is advertised as "Long Life" should be FAR superior to a set for $14 that you'll replace just as often. Just a thought.
~my 2 cents~