That makes sense. Just didn't want you to have unrealistic expectations or spend money trying to improve this system. I don't believe it even has digital audio inputs. You'd be better starting from the ground up when you get a tax refund, christmas gift, etc. As a stopgap, it likely has better...
You shouldn't use the tv's speakers as your center. There are lots of reasons including that they won't match the aiwa speakers, your volume among the speakers will be off, sounds will duplicated, etc. I think we actually have one of these systems from my wife's pre-married days. We even have it...