Like I said, the Hsus have stronger and deeper bass than the p162s (the p162s are exactly the same as the p163, except for the color of the front baffle). The p162 have crisper treble, certainly hotter than the HB-1s. It might be for this reason that I can listen to the HB-1s more comfortably for longer periods of time at high volume levels. I prefer music on my HB-1s, but the Primus speakers do music great too. For movies they are both great. I would say if you have a larger room, the HB-1s are more appropriate since it seems like they can handle higher volumes more easily. For a smaller room, the p162s might be more appropriate since their off-axis performance is likely better and they don't have the controlled directivity of the Hsus. I think you would be happy with either speaker. If you can make the swing, the p363s would be better for large rooms, they have fantastic mids thanks to their superb mid woofer which is supposed to be one of the best being made today at any price. But again though, while I do find the highs to be a bit crisper and more enveloping, I do find the speaker more fatiguing then the Hsus for prolonged high volume listening, like an entire album.
For a center channel with the Primus, get the c351- like I said, those mid woofers are fantastic. For rears, you can use p153s or p143s, those are smaller and less expensive speakers then the p163s, and would serve fine as surround speakers.