In a room that size, I think 8" drivers are too big. I don't have the Voxativ but I do have the AER's and they sound pretty much the same (i.e., in a big room, they smooth out but I wouldn't want them in a small room).
Maybe one of the nicer Fostex "special edition" 163 or 166ES-R's, possibly the 168E-Sigma, are as big as I'd personally go. The 6" Lowthers are also nice, and come in options like Alnico (for what that's worth).
I've switched over to very small drivers (FE103En, FE108E-Sigma, the old original FE108-Sigma, a few others) and I really like them for smaller rooms, and near-field situations. The fact that they are cheap is just a freebie. They aren't anything like the FE126E which I find almost unbearable. (The 168E-Sigma also has a 7k peak, but beams more and it's bigger so it's easier to be off-axis -- the 166ES-R's are very smooth, might need a rear-facing tweeter for some but not me.)