I would say the BIC acoustec HT-64. Buy it at Overstock for $220 or shoot BIC an offer of 200 and see if they accept.
I say this because yours is a big room and those speakers are very efficient, meaning they will get very loud even with a lower power receiver. If it says 90watts "on the box" it is probably closer to 30 or 40 unless it is one of a few select brands that advertise their true outputs... but I digress.
Those speakers will really rock!