For lots of detail and great bass slam try the Cary 303\200 or 303\300. Each can be had for 1200-2000 used. They're superior "Class A" machines. When I a\b'd the 303\200 with the 840c I preferred the smoother sound of the 840c BUT your tastes seem to run to more detail and superior bass which the 303\200 does have.
Good Luck,
Raul
Good Luck,
Raul