Well, the Jantzen Silver Z caps are in. Only put in last night and they may need burning in a bit, but first impressions are promising. Far more subtle and delicate sound, where the original phillips caps were brash and hard in the upper mid/lower treble. More sense of instruments inhabiting their own space, via enhanced microdynamics, and reverb/amosphere is easier to hear in a deeper soundstage. The upper treble is still a tad bright, but that has never been a problem for me. All in all, a bloody good £45 notes well spent. Did chew up the back of the cabinet a little in the process of removing the crossovers. Obviously, my glue is tougher than yours!