Ahhh, single driver full rangers huh? I saw those two hole on what I thought were the front mdf baffles and guessed otherwise. I would have helped if I read your post a little more carefully too. Now I am really interested in the final outcome. As you know my experience with the Fostex 166 BLH was less than satisfactory  until I added the supertweeter and a sub woofer. I have never heard the Nirvanas but they seem interesting.  
 
The speakers I guess will go in your listening room then and not your office? They look kind of big for an office, they seem to be  36"X 8".