At the moment, 6, recently pruned down from 7.
Thiel 2.7 (main speakers).
MBL 121 Radialstrahler speakers
Hales Transcendence 1 monitors (and Center)
Thiel 02
Spendor S3/5
Waveform Mach MC
Monitor Audio Bronze monitors
Recently sold my Thiel 3.7s (too many speakers!)