Musicaddict, I found your comments interesting. You said "I'd be scared to hook up a Boulder to the already "hot" 802D". Mark_nz remarked in his earlier post -
07-03-11: Mark_nz
..I have auditioned the 802D in combination with Classe, and separately the 802 Diamond in combination with Corus & Jeff Rowland Model 625.
Both combinations sounded good - but I thought the 802D + Classe had a bit better overall tonal balance whereas the 802 Diamond + 625 combination was a bit bright. I also compared the Model 625 to my Cambridge Audio Azur 840W amplifier. (using Wadia CD player and Corus preamp).
Unsurprising the Model 625 best the 840W in terms of detail, transparency, soundstaging, bass control and extension. However the 840W (which has slight warm bass and soft treble) was a better tonal match for the 802 Diamond. The reason for this is that 802 Diamond is brighter and has tighter (less bloated) bass than the 802D.
So based on my experiences a slightly lean amplifier (with good bass control) will better suit the 802D.
Hifimaniac & Guido both remarked they thought the Boulder sounded slightly leaner than the M625, likely making it a better match with the 802Ds (or similarly bright sounding speakers).
You also accurately commented "I auditioned the 802D several times for hours and deemed it a speaker that begged for slightly warmer, but detailed, electronics.". I agree the Boulder needs a preamp with warmth, sweetness, holography and detail to balance it out. There are probably several reference tube pre's which would sound wonderful with the Boulder...Guido mentioned VTL, my favorite is Ayon. Vive la difference!