Cheap volume for large room

I just moved into a loft style condo and am dealing with a huge room - 45' l x 24' w x 20' high. It is eating my ML ReQuests for breakfast and I'm thinking I need a bigger, taller, cheap set of cone based speakers to compensate. I think good clean stereo in a small room is killer but this room kicks sound quality down the priority list.

After poking around I found the PSB T8. They look perfect with 3 tweeters and 3 subs but the model is new and a bit out of my range at $4k+ (T8) used.

http://www.avrev.com/gifs/psbplatinum/T6.jpg

Anyone know older model speakers similar to the PSB T8? Or just models that move a lot of air for this huge space?