One 12" or two 10"?

Not a lot of budget atm, so looking at a couple of Prime deals this week. Room is 16'x24' with a large open hallway next to it, so effectively 24'x24' and have a 12' ceiling. Couch is about 14' from the screen. Given the large area to deal with, should I go with one 12 or two 10s? Klipsch R-100SW 10" ($189 x 2 = $380) Klipsch R-120SW 12" ($246)

Receiver is Denon AVR-S960H with a decent amount of power and can support two subs if I go that way. Will use a five speaker arrangement. Thx