Ummm Adam...Hate to bust your balls but did you look at the specs of the LS800Ps? I've lugged these up a flight of stairs believe me you don't want to be doing this
That being said if you add these to the 750Ps you have a heck of a school system
http://www.yorkville.com/products.asp?id=213&cat=2&type=29
Just got to find so rookies..er um suckers..er um...help that wants to make a few bucks.

Boy that does bring up an interesting scenario. Because there is no way I am lugging 130lbs + up stairs either. Hmmmmm....could the 750P do the job on their own..say the Bose failed?
I'm not talking bout schools. Mainly simple bar bookings and small weddings. (felt the need to clarify the intentions of use)

And I am not even Canadi....whatever you are. 
My wedding setup is all powered RCF 200 Arts (12") and ART800 subs (15"). They also double for Ceremony use...and if that's the case, I use the 750's for the Reception with the RCF subwoofers.