I'm having a new home being built. The living room/dinning/kitchen is all one big room with a vaulted ceiling measuring 20X36, walls 10 ft. and vaulted ceiling peak goes up to 20ft. I picked up a pair of new Alto TS208s cheap to use for sound in the room for TV, music and even performances (acoustic), and I am looking for a subwoofer that wont break the bank. I was hoping to find the corresponding sub for the TS208 but the 12" is sold out (Alto TS2 is a discontinued line). So far I was hoping to keep the cost of the sub at around $300 and the two I've been eyeing are the Alto TX212s and the Behringer EUROLIVE B1200D-PRO 12". Recommendations appreciated and I am not opposed to buying used.