I own the VR-4 HSEs driven by JC-1s as well, and have preferences in music that are similar to yours.
After living with both single wire plus jumper, and a bi-wire setup I find that the soundstage is wider and deeper, and the presentation more open and dynamic when bi-wired. I'm using Ridge Street Audio Poiema bi-wires, which are also fast and open, but have more weight than your Au24s.
I think it would be worthwhile to continiue experimenting with different spikes. The narrow body 1.5" Audiopoints helped to increase the transient response/speed and overall coherence of my VR-4s These were a big improvement over the slower sounding 2" Audiopoints I originally tried.
I would also recommend plugging each of your JC-1s into a dedicated 20 amp outlet. I haven't done a lot of back and forth comparisons, but did notice a slight softening on complex transients when two JC-1s share the same 20 amp outlet.
One other tweak, albeit an expensive one, is to sit your JC-1s on Sistrum SP-101 platforms. These help to produce a very balanced and open presentation, with great detail and extension. No leaness or lack of weight as rpl... suggests, and they do make the soundstage taller.
After living with both single wire plus jumper, and a bi-wire setup I find that the soundstage is wider and deeper, and the presentation more open and dynamic when bi-wired. I'm using Ridge Street Audio Poiema bi-wires, which are also fast and open, but have more weight than your Au24s.
I think it would be worthwhile to continiue experimenting with different spikes. The narrow body 1.5" Audiopoints helped to increase the transient response/speed and overall coherence of my VR-4s These were a big improvement over the slower sounding 2" Audiopoints I originally tried.
I would also recommend plugging each of your JC-1s into a dedicated 20 amp outlet. I haven't done a lot of back and forth comparisons, but did notice a slight softening on complex transients when two JC-1s share the same 20 amp outlet.
One other tweak, albeit an expensive one, is to sit your JC-1s on Sistrum SP-101 platforms. These help to produce a very balanced and open presentation, with great detail and extension. No leaness or lack of weight as rpl... suggests, and they do make the soundstage taller.