Listening room is 15' x 16', with high ceilings. Room is mostly open to an equally large kitchen/dining area. Main seating is around 7.5' from the front speakers.
My issue with waiting on a center channel would be if the matching center were discontinued. If I spent $1,000 now, I would expect a year or so before speakers come back up in the budget. It seems like I could keep my current bookshelves in the rear forever since they don't seem that important. The subwoofer seems like I could keep it for a while, assuming the new floor speakers reach down to at leat 50hz (like the current bookshelves do).
$1,000 would get a Polk set on newegg right now:
2x - 75T
1x - 25C
2x - 45B
1x - PSW505
Polk doesn't seem to be highly regarded in speakers, so thats when I came here. I want to see what other people would do given the same money.