...I know I need to experiment a lot ; just want to be going in the right direction!...
Yessir, that's exactly the way to look at it. The HDs will bias your relative string volumes
away from bass
toward treble, and the medium-lights will sway the balance the exact reverse ...exactly as the string gauges suggest. Going to regular lights maintains the same relative balance but decreases string tension, though the tonal result you hear varies from guitar to guitar; and as you have noticed may sound weak/less authoritive because of the diminished tension driving the top (the tops on GO, GS, and DN are designed/braced
for the medium set's tension).
But again, every guitar (and player's preference) differs, so tonal generalizations are just that: generalizations. You've etablished you don't care for lights (FWIW, I'm the same way on the GS/DN ...couldn't stand the lights, personally). The med-lights, however, may be the wrong direction for your stated desire. Try the HD set as the bias toward the treb strings may give you the individual-note definition you're looking for without sacrificing too much bottom end. FWIW (again
), I have a GS that's big and deep sounding akin to your GO and I went to the HDs in PB as I've been going through the tonal neanderings like what you've described. I found the tonal balance better than the straight medium PBs, but after living with it for these several months, I find I miss the punch and Authority of the medium set's E and A strings. Thus, I may just go back to a medium set in 80/20 and see if that gives me the clarity and definition I desire without sacrificing the guitar's punchiness. No way to predict how the HD set will sound or your liking it on your GO without you giving it a shot.
That said, this may not help your desire for "easier tension" on the fingers. If you find yourself feeling the HDs lacking in bottom, perhaps try a medium set in 80/20 (elixir or your favorite other brand), and then check your string height/relief. A heavier gauge string allows one to get away with lower action than one can get with a lighter gauge set, particularly with a light fingerstyle attack. So if you set up the guitar's string height/neck relief properly with mediums, you may notice little-to-no difference in
feel from light gauge; a good setup makes a world of difference! Hope that helps you a bit ...let us know how it goes
Edward