Okay, I need to finish up with this thread.
After several days with this sub, I have learned several things. One, is I have quite a learning curve every time I add a new piece of gear. When I first listened to the pair of AV series bookshelves I built for my parents, I had a "personal break in period". Going from the metal dome tweeter in my definitive technology speakers to the silk dome required some time. My ears, and brain, needed the same time with this sub.
Danny summed up my situation. I went from a sunfire sub, to a servo sub. There was definitely extra boom in the sunfire.
I sold it a couple weeks ago so I couldn't do an A-B test.
Steve Earle's "I'll never make it out of this world alive" has some great articulate bass and some floor tom parts that I knew were there, but I heard in effortless detail with the servo.
Harry Connick Jr.'s Christmas album "When my heart finds Christmas" also has lots of upright bass. And wow, listening to bass players is so much more interesting when you hear everything they play. My sunfire clearly couldn't play notes higher in the instruments register when they would play those walking bass lines. But the servo did.
The Wallflower's "God don't make lonely girls". I love that song, and the kick drum had some real character through the servo.
I didn't use this for home theater much at all, but in Saving Private Ryan, towards the end when Tom Hanks and company are waiting for the final battle, the tank that they hear off in the distance was so fun to listen to. Watched it 3 times. It was subtle but clear and created more of the experience probably intended by the sound engineers.
All in all, servo has blown my mind and I can't wait to hear OB servo bass! Someday, hopefully soon.
Thanks for all the build and finish advice everyone! I have learned so much in the last 4-5 years here and can't wait for my next project.
Ben