that amp should be fine if your subs are the dual 2 ohm versions(each wired in series, and then the two subs wired parallel=2ohm). If they're the dual 4 ohm then you have to wire them into a 4ohm mono load in which case the amp will not be fully utilized. Remember an extra 200 watts (1000 vs. 800) will only yield about 1-2 dB's of extra output in that set up. So if your lanzar amp sounds good with your subs, you may want to think twice about spending a lot on another amp.

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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