Ok long story short I have incoming

head unit Alpine CDE-HD149BT

amp. Alpine MRV-V500 5 channel will be 120 watts RMS x 2 bridged at 4 ohms + 250 watts RMS x 1 at 2 ohms

door speakers alpine components with crossovers. R-S65C 100watt rms

Now should I just get a sub enclosure and put it in the hatch area or put new subs in the factory location? Recommendations please.

Thanks