I had a set with the legacy SV5, SV2, JuicyBucker. I also tried the SV5+ instead of the SV5. The SV5 (and the +) were really hot, and were fine for rocking out, but as you say, are a bit hot for the blues clank. The JuicyBucker was sublime for rock, and the SV2 actually worked so well in the middle position, that I hardly used the neck pickup. I either ran middle only (for neck type tones) or Juicy for lead. This is not to say that the SV5 is a bad sound, just not the sound I usually use. I did lend the guitar to friend and he loved that SV5 - he now has the SV5/SV2/SV5+ in his guitar and it works so much better for him than my underwounds.Have you tried any of the others? I have the VH in n/m and an sv5 in bridge. I really like them but they don't do that biting blues clank thing
The Z-series Underwound set is much more vintage sounding by comparison. After comparing in the same guitar, it is obvious that Scott from Zexcoil really likes that hotter tone, and the legacy SV5 is considerably hotter than the newer Z-series vintage sets. The Underwound set is my sound. But, damn, that JuicyBucker is sublime for rock or bridge rhythm.