Its only a good deal if they are your favorites, and do what you need. As a PSB Image owner, I would personally like to have towers for HT, and less that, the larger B25s. I then would also opt for the larger C60 center. That combo will cost a bit more, but well worth it IMO.
If your volumes are only modest, you sit close to the speakers, smaller room etc, these might be just fine.
I have no clue how the EMP perform. I have become a slight Ascend fanboi as well, and speakerman39 has got some for sale here.
I would recommend, between those two, the 706 if ONLY for the preouts.... just in case... as that will give you more freedom in the types of speakers you can choose, whether now, or in the future.
For instance, there is a fellow who got some B25s, three of them for the front stage, and he's been driving his entry level Denon into serious clipping/distortion. The speakers do drop to something like 3.7ohms at 177hz(?) IIRC. I recommended to him an affordable 2ch pro amp to ease the burden on the receiver's amplifier.