The BIC is a good $300 sub, it's still a $300 sub so don't expect miracles especially in a room that large. Despite what you think, that's a pretty large room, and I'd really say you'd want a couple of 18" subs for a room that size, but that costs quite a bit. For $300 the BIC's probably your best bet, for $500-600 a DIY 18" option is your best bet.
7.4.4 Theater Room: JVC-RS500, Silver Ticket AT 2.35:1 142”, Onkyo RZ830, Anthem PVA-7, Panasonic DBT-110, JBL Studio 530’s, 4 - 15" DIY Sealed Subs
3.1 Living Room: Samsung 64” F8500 Plasma, Anthem MRX 300, Dynaudio Audience 52’s, Dynaudio Audience 122C, NHT SubOne