I'm still absorbing your room schematic, but at first glance things look pretty good from what I can see. I like the PB2000s. They might just work for you, but if it's in the budget I do think it's worth bumping up to the PB3000s.
Looks like you've done some homework and are making good choices. Great post with good info too.
PS- That is a good sized room. I think I would bump up to a pair of PB3000s