that stems from Bose having a very very long history of keeping there trademark sound secret, besides most specs you see for other audio equipment are fake anyway or are only "peak" levels, a 1000w amp is not 1000 watt's, it might make 1000 watts for a split second-maybeI agree, they sound great. The problem with Bise is they intentionally design their systems to be incompatible with anything else. Another issue, is that UNLIKE reputable audio equipment manufacturers, they don't publish any specs od their equipment, such as amp, OHM or hz or the level of output signal.
I have the same system in my yukon denali, I upgraded the head unit to a pioneer nex with wireless android, maestro rr interface, added a amp and subs, disabled the bose anc and it sounds pretty good. I would have to spend another couple thousand to make it sound any better