Just had my first real chance to sit down and listen to my system with the hi-cap, as we've had vistors all weekend.
I only got about 45 minutes, and I guess the cap isn't warmed up properly or burnt in yet, but my instant response was AWESOME.
More of everything. More PRAT, tighter deeper bass, better mid and treble. More space between notes, also far more soundstage, width and depth. I find that the IBL's normally disappear and just produce music, but with the hi-cap they are totally invisible. No hi-fi is present, just music.
I think that adding a hi-cap to the 72/180 is one of the best value for money upgrades I've done, even at just over 800 pounds with the current exchange rate. The only upgrade I've done which was better was swapping my Linn Index's for the IBL's.
Very Very Very happy Simon