Mmkay.. Oh boy, electronics are not my strong point!

So to sum up:
It'll be okay to do the pro with the 4, and "double up" on the outputs, but with a y connector or tee or quality powerstrip?

I'm liking the sound of this y connector. :] I'll have to look into this. Thanks everyone for the fast responses! This forum is brilliant. <3

I'll do the pro, and do one output for the top and bottom row and then set up the two enclosures in the middle row on their own output. Woohoo! I feel much more comfortable about this all now, thanks again.