When we started looking to upgrade, stackables were a MUST on our list. We wanted the BH 3670 at first but getting a stackable into the closet would have called for several modifications and I didn't think I would like working with the laundry in such a confined area (with doors of w/d facing our clothes in a crammed closet). Camping World, Katy, TX says they have put stackables in the 3670 but haven't seen one after it has been done. Any of those owners on the forum, please chime in.
Floorplans showing the stackable in the closet next to the commode room and on side wall is a good way to go.
We opted to go with the Augusta because we have separate doors for the w/d facing into the bedroom beside the large main closet. Love it!!! Did have to make sure the tech properly braced the w/d in place so be sure to check stability no matter which way you go. Plus, we asked for metal vent on outside of RV rather than the standard plastic. Metal vent on our first BH (which had a combo w/d - too small) was great. Metal vent put on the Augusta is not what we expected and we are having it replaced next Wed. (Too easily bent and kept the flapper door open - not a good thing because we do not want unwelcome guests showing up).
Since we took possession of the Augusta on 6/20/08, I have washed every day except one. No more wrinkled clothes and I can wash two king sized sheets plus pillow cases at one time - Hallelujah!
Good luck on your decision and enjoy whatever you decide.