... Does anyone have experience/advice that might help me with the decision. I'm semi retired so these strings are somewhat of a big investment for me.
Since late last year I've seen and played a number of DBs using
Eurosonic (NFI) sets (I'm guessing in Ultralight tension range) in bluegrass circles and have been impressed with their volume, tone and feel.
Eurosonics have a metallic/synthetic hybrid core with a white "Polimide" (nylon like) synthetic outer winding. Their volume is excellent, a metallic tone is noticeable but not overwhelming (but is a little more metallic than I prefer for my Alcoa since I'm trying to subdue its natural metallic tone). The Eurosonic feel is excellent. Their price is also excellent compared to other brands. If I had a wooden DB I'd definitely be trying these strings.
On my Alcoa I use [Invalid or Expired Link Removed] EA under
Superior Bassworks (SBW) Deluxe ("Dirty Gut" color) medium tension DG...
SBW Dirty Guts are basically a dark yellow colored Kevlar core "Gator Line" which has been "spiral cut" and then setup with rubber dipped metal ends for secure tailpiece mounting. They are probably the nicest "cheap wacker strings" available and their price is excellent. They come in a "bump pack" of 6 strings to span a very-low-tension to heavier-tension range of thicknesses. The spiral cut makes them feel and look very similar to plain gut; these strings have an excellent feel and they do move a lot of air, and they surprisingly bow very well probably due to the spiral cut. On my Alcoa the whole set of these strings sound great amp'ed or DI'ed, but acoustically the E and A were a problem... The medium D and G have actually been excellent acoustically, but I couldn't get even the heavier E and A to produce enough acoustic volume and clarity, so I replaced them with...
SilverSlaps are synthetic core, nylon wrapped strings, the lightest tension in GHS/Innovation's line of strings... On my Alcoa the E and A strings are loud, clear and they produce a noticeable growl that helps them really cut through a mix of instruments acoustically. Their feel is excellent and they also move a lot of air. They are tough for arco -- I needed to play them for about 2 weeks with generous rosin and a tight bow before they started responding reasonably well. But for pizz and slap they are great. Interesting to note: my SilverSlaps E and A had somewhat of a "plastic" tone that went away after a few weeks of playing, and I've seen one or two other references to that here.
I've been using this mixed set for about 2 years now and they've been doing very nicely for me. They are surprisingly well balanced for tone, volume and touch. They are so good on my Alcoa that it's been very hard for me to pull the trigger on trying other strings...
Somewhere in my string bucket list is plain gut DG over SilverSlaps (or some synthetic) EA, but I think this is going to be a number of years down the road.