Wolf, I'm not much of a string-fiend. Right now this is set up with the Markley Nickel Rocco Prestias. Over time it's seen everything from Tomastiks to GHS Boomers, usually it winds up with whatever's cheap at Sam Ash the day I bought 'em. I'm afraid I don't hear a whole lot of difference, feel a whole lot of difference from brand to brand, other than nickel roundwounds are tamer than stainless steel. After they go dead in a week or two, they all sound the same to me. Now that I no longer gig, they don't get changed very often at all. I'll probably settle on D'Addarios, even though it galls me that they put those colored balls on the ends so I can tell which string is which: I've somehow never confused a 135 B with a 45 G !
J o e y