Eh... I've sacrificed any sort of computer upgrades in favor of my audio needs.
Strictly stereo though:
Thiel CS 2 (beautiful old speakers from 1989, weigh about 65 lbs apiece, dynaudio and peerless drivers, gotten for a tiny percentage of the original list)
B&W ASW650 sub (nice, closed 12" sub, musical and reasonably attractive)
and to drive it
Outlaw RR2150.
It's incredible for music, but only ok for movies, as it lacks the dynamic punch.