I have not heard those model PG components but I have hear other PG line ups, as well as many other components in that price range. and they all sound about average. compared to the higher end comps iv install.
Iv installed the OPs system. iirc he wanted to have his front stage sound like mine. and im running a heavy Dynaudio active system. I have near perfect blended sub setup in back. the OP I belive has a bass heavy sub setup, he is running his Rainbows passive. he could be running active and the sound can improve. I just wish I had more time and tools when I was installing
buying a cheap component system that is made to run passive is NOT going to help improve his midbass or anything in his situation