I love DR sunbeams for about two weeks, then the love affair ends. I love the feel and sound out of the box but I doesn't last. I was thinking about trying D'Addario XL170 nickels. I like that you can get them cheap and sometimes in a two pack deal. I want a nickel string that lasts longer (in terms of brightness). I play a jazz bass and use a lot of harmonics (sunbeams did this well, for two weeks anyway). When I was using stainless for awhile I liked roto swing bass 66, but have gone back to nickel. It seams I like round core strings and wondering if hex core will effect use of harmonics (jaco style, only crappier bassist playing them would the XL 170's be a good choice based on my needs?