it appears that you have about 850 watts rms. So 850 x2 (50% efficiency)=1700 watts total draw / 13.8 volts=123 amps. I think a 100 amp ANL should be fine as they tend to allow 10-20% over current for some time before blowing. Also, the 50% efficiency may be a little conservative for those amps, so your system would not pull as much current(at 60% eff. it would pull 102 amps). Go with a 100 amp ANL.

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2004 300M SPECIAL
Alpine CDA 9833
Alpine Pxa-h701
Alpine Rux-c701
Rockford fosgate p400-4
Rockford fosgate p4004
Hifonics BX 1205D
JBL c608 GTi
JBL p963
Infinity 2.5" center channel
Alpine type R 12"(2)
200 amp alternator
yellow top battery
0 awg power and ground (welding cable) 300 amp anl fuse
all active SQL set up with 2000 watts rms