I'm in the same boat for when I pick out my sub amp, and I'm bouncing around the Taras, SD and NVX. From the reviews they are consistently good and the testing vids I saw were always on par.
IF you can find one open box or used, the Alpine PDX m12 is an option. I've run two PDX series in both full range and for a sub and they ran cool as a cucumber even on 6 hour road trips, no weird voltage drops or hums. I welded a stud near the amps for the ground and all my body to frame grounding straps had been upgraded and I used dielectric grease.
Bestbuy was having a close out sale and I scored something like 100 ft of 4/0 monster wire, bare wire measures at around 3/4" and I sold half of it and used that profit to pay for the rest of the wire monster 12g monster wire and 6 sets of twisted pair RCA cables.
Good luck w/ the jeep build. What else are you modding? Upgraded axle shafts, locker?