Zavfino Prima MKII OCC Speaker Cable would probably be a good match for the Pulsars. They seem to be rich in the lower and mid frequencies. In my system it is a little too much (Fyne F 1-8 speakers).
I second the Rogue RP-7 preamp with NOS tubes. It is what I use, though the rest of my system is very different from yours. I had a Benchmark LA-4 that I sold after trying out the Rogue. The LA-4 is really excellent but it is not going to get you the bloom and richness that you are seeking.