I didn't see where it was noted, but what are you trying to achieve? What problems are you trying to address? What do you hope to gain beyond simply having new speakers? Basically, why are you getting new speakers?
If you are unhappy with the existing system, based on the pictures it at least appears that much of that may be due more to the implementation than to the products. Simply installing different speakers in the same manner may not improve anything, in fact it could be worse. And unless you have people with experience flying speakers and the know how to select and install the correct hardware, then do not do it yourself.