I would start by contacting @Ed Mullen
of SVS and letting him give you some in-depth technical assistance. That is part of the service that SVS provides to its customers, and he will be able to help you at no charge. If you want someone else on AVS to be able to help you, it might be helpful to list your location. It is very possible that there is someone in or near your community who can come assist you in person.
I have some observations of my own. First, I am not sure what you mean when you say you have a new lounge coming. Does that mean that you will be extending the HT to the rear, by expanding the room?
Second, you appear to have a very good frequency response with both subwoofers in the rear corners. In your photos, you referred to those locations as: "ear-to-ear, smiling, impactful bass". If that's where they sound and measure the best, then you may be fighting an uphill battle to make them work equally well somewhere else.
Third, in looking at your recent graph, it appears that you have been able to get a very strong house curve from about 16Hz to 40Hz. A lot of people would like that low-bass emphasis. But, from your description, what you are really looking for is more mid-bass; more chest punch. You can try using the PEQ in your subwoofers to increase the mid-bass, relative to the low-bass. The Music setting adds about a 3db boost at 63Hz. That is right in the maximum chest punch area for many people. Ed can advise you on additional settings you can try.
For instance, you might also try adding a high-pass filter at a particular low-frequency, with a mild slope to roll-off the lower frequencies a little. That would allow you to increase the volume of all of the mid-bass frequencies, relative to the low-bass frequencies, just by increasing the volume of the subs.
The PB3000's are quite powerful in the mid-bass, compared to the PB12's you had. But, they also have a lot more low-bass capability than you are used to. From what I can see from your post, and from your graphed FR, it's just a matter of placing the SPL emphasis where you want it. That's the sort of thing that Ed might be able to talk you through. I would probably start there, if I were you.
Edit: I started to say this earlier, but I decided to come back and add it after all. Not everyone likes a lot of deep bass. Even if the frequency response is fairly even in the low-bass range, as it is in the last graph you showed, some people might characterize the elevated low-bass as boomy-sounding. One other thing you could try is to operate your PB3000's in sealed mode, with both ports plugged, and with the corresponding setting in your DSP.
I had something similar in mind when I suggested a high-pass filter, perhaps at about 35Hz, with a 12db per octave slope. That would roll-off the low-frequencies a little more, relative to the mid-bass frequencies. You could try both, but the sealed mode might be the easiest way to experiment. That will immediately attenuate a lot of the low-bass and give you a higher proportion of mid-bass.