Acoustic Research P10 / C06

Does anyone have experience with the P10 amp or C06 preamp from Acoustic Research?
Yes - I've owned one for years - I have put it back to back with some big name amps and I was getting up to $10k NZ and I was going sideways but not improving hence the reason I had it as my amp for 25yrs - I replace it with one of LFDs top amps and still can't sell it - it did have a bad transformer hum that was audable at low volume - I have just had it fully rebuilt and just cracked open a nice red wine and put it though its paces and its feels like Christmas Day ! :-)
If your looking at buying one do so :-)