Well it's official...the PB13Ultra arrived on Friday, on Saturday I sold both my DIY Plus and today my 20-39+. It took all of about 40 seconds to make that decision. Simlar output, but as the early guys expressed, no thud, sharp attack, I can't detect any overhang, and fit and finish are superb. I wasn't sure about the Rosenut. My floors and furniture are dark oak (the floors red oak). I though Natural Oak was the way to go, but the Rosenut actually works better. I haven't had to deal with the size and weight issue before (other than the DIY), but I'll put up with the challenge.
Dual Pluses were awe inspiring in my setup and I wasn't sure if the Ultra would be worth the upgrade...I was totally wrong. I listen to a lot of music, the Pluses were good, but can't touch the Ultra13. It reminds me of the DD15 I had here briefly, but on steroids.
The only drawback is my room limitations. My wife was gone over the weekend, so I just dropped it into my preferred spot between my display and my FR. This is optimum for my room with every sub I've tried. I couldn't keep it there, just too big, so I put it back in the left corner behind the display with the help of my son yesterday. Corner gain decreased the SQ a bit(20dbs up from 15-40hz, it then slopes down gradually, thankfully, to 80dbs from 40-100hz) which I hope PEQ and room correction will fix. I'll experiment, but the damn thing is so heavy and stuck in an awkward postition to adjust...difficult to do by myself. Anyway, I'll get it done...even the corner position is far superior to my fairly flat duals.
Craig was correct in his comments on an another thread. For HT and if your particular taste lends you to prefer the low level impact that translates to rumble and sometimes thud of the Plus/2 or dual Pluses, there's no need to upgrade. If you want to hear and feel the sting of the explosion or bass note as a sharp attack with consequent punch the Ultra is what you should aim for. I prefer it...finish on the Rosenut is amazing.
I don't lurk as much as I used to and I NEVER listen. Comes from being old and cynical.