"Interesting you said Vandersteen... always loved the sound from the 5's at Audio Connection (when we lived in NJ). Was thinking Quatro. I don't think the room can handle the 5's."
Your room can handle the 5s just fine. As long as your listening position is far enough away that the drivers integrate (about 8 feet), the room is big enough. I went through this with a set of 3A Sigs, where people said they would be too large for my then 11x14 room. I spoke with Richard Vandersteen who confirmed this was not true.
In addition, the 5 has the fully adjustable integrated subwoofer, so you can adjust both its level and use the parametric to help address any room modes.