You guys need to check out the new JBL PRX500 series of powered speakers.
I just recently switched to those and honestly they perform much better than my Mackie system ( 2 x sa1521 + Swa1501).
I also considered the Bose, and when I did a side by side comparisson between the Bose and 2 x PRX 512 + PRX 518 sub, JBL was clearly the choice.
Bose is nice for smaller audiences, but lacks that powerful sound that JBL has.
I personally think that the Bose is way overpriced for what it offers. I purchased the JBL package for $2600 , where I could have bought only one PAS system for that money.
Here is a link for the PRX series with built in CROWN amps : http://jblpro.com/products/portablesound/prx/