Do you plan to wire the 4 ohm DVC's for 1 ohm? Not many amp PSUs are able to operate down to 1 ohm stable even though they rate them at that to claim higher power figures so would double check. Going for an SPL record in an X5
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You will definitely want to complement all that LF with some HF. Terrible part is we are stuck @ 4" component woofers without custom fabricating panels in the doors.
I run 2 x zapco X-150.6LX / Mobridge DA-1 / Mosconi 8to12 aerospace DSP to Morel components / Mosconi 8" midbass & JL 13 TW5. Did this in Nov 17 and haven't run into any electrical issues and do not run a cap and still on the original battery. I have the 4-zone climate control so have the 220A alternator.
Here are some pics of the install -