since you're willing to spend as much as 9.5k on HU, i'd rather have the x9650bt (Php8000) OR go with that x7550 (5.6k) plus
Auditor RIP 165S * 4.8k (owned by Focal, IMO one of the best bang for the buck seps) or its new version
Focal Auditor R-165S2 (hopefully not far from the price of the former) or JBL GT0 seps...like what jhnkvn said, for base unit, either alpine or pioneer.
AMF-4100S would be 200WRms x 2 * 4ohm if i'm not mistaken, and assuming na ang JBL sub mo is either 12" GT0 (300W) o GT5 (275W) series SVC, kulang sa power yung sub. Instead of buying a mono-amp, don't buy the LL amp and just buy a better 4ch amp like Sound Magus 160.4 and set it up as 3ch - jan sigurado busog at happy ang JBL sub mo.