I have both. I am using LG HTIB wt small Jamo speakers (+ Jamo 8in sub) in the bedroom while using the HK AVR630 wt Mission speakers (+ Paradigm 12in sub)in the living room. Had both of the system wired around the room during the last renovation.

My opinion is that HTIB has less power (less ooomph) but suitable for small enclosures, like bedrooms and small apartments. But they still can pack a punch, if you push them (especially the sub). Small speakers makes the room less cluttered.

But what r u really looking for? The price for HTIB is very cheap nowadays. Of course quality cannot beat the separate AVR units.