unfortunately, your speakers, especially the kevlar midranges, are still considered to be one of the fastest, most accurate drivers on the planet (unless you have the ears of a martian).
this means the sky is the limit on what amp and preamp you could use, and that goes for your source as well. i had 801's and i upgraded endlessly to get more, always much more music out of them. the last time i heard them my friend, who bought my pair, was driving them with pass aleph equipment (the 1.2 monoblocks were $14k a pair) and once again they were completely transformed into "something else". listening to small jazz groups on them at that point was something you do NOT want to hear until you are ready to clean out your bank account.