Thanks to all who replied. It is very difficult to decide on a sub without ever hearing it in my space, but from the sounds of things, all of the names batted around here would be good choices. Space IS a concern because the room is only 16-17 feet from front to back, but I convinced the wife that the Empire can hide in the corner behind a chair. I wouldn't exactly say "hide in the corner" as much as "own the corner", but maybe we can use it like an end-table. I doubt I'll ever sell her on a second one. However, now that I've decided to "up the ante", I'm going to wait to hear what my local dealer would recommend in the same price range (~$900+). If he just says "a bigger Sunfire" then I will pull the trigger on the Empire. Thanks again!
Jon