I think for many a time I have recommended everyone to use a dedicated AV Amp with hifi speakers, even 2nd hand, which I believe will sound anytime better than the package system.

This is an example of a system for sale --> Sample used set for very good price.

You can slowly upgrade the speakers etc..

Do try your best to use wired speaker for best overall control. I know it looked ugly. But after 2 weeks, you and your wife will forgive its appearance.