If both your TV and AMP have ARC function, then you dun need an extra optical cable to connect between your TV and AMP (for outputting the TV sound to the AMP), the HDMI will "UP" the sound from TV to the AMP, saving one optical cable
3DTV: Panasonic P42GT20H (Nano 305)
AMP: Pioneer VSX-1020 (MAS 50A HP)
BDP: Panasonic DMP-BDT300
F: Roger CS9
C: Bose VCS10
S: AR
SB: Atlantic 153c
FH: MB Quart 460
PB: Belkin Pure AV PF-30