Best type of Sub to consider?
For the tightest, punchiest, most detailed lows, it would be expensive but the best would be a "Isobaric" designed sub, it will be large also too get the LF down low.
You’ll to have deep pockets and have to search to see if anyone makes a really good one.
This is how they work: http://www.vueaudio.com/isobaric-subwoofer-design/
Cheers George