big open area not ht friendly = ported sub to overcome low to bad room gain to get you the lowest range possible.
small/medium area for dedicated ht = sealed sub to utilize very good room gain. I would even do two sealed subs to equal out response. Dialed in, you should get flat response down to 14-15htz., possibly lower, due to room gain. Using ported subs in this scenario, especially corner loading them up front, will make the ported subs sound real boomy and sloppy.
Looking at your layout, ported sub or subs all the way.
Dedicated Theater Room: 7.2.4
SI 2.35 5-Series Pure Gray CinemaScope 133"; Epson 6040UB
RTIA9 Polk, CSIA6 Polk, FXIA6 Polk / Dual JTR Cap 1400 Black Oak Finish
Oppo UDP-203 4K Blu Ray
Emotiva XMC1, Emotiva 3 channel amp Gen 3, Emotiva 4 channel amp Gen 3