my advice is simple. sell the bose and sony.

get some good speakers #1, get a good receiver #2, get an inexpensive dvd player (but from reputable brand - Denon for example) #3.

ill rank them that way because they will become outdated the soonest with that approach.

i would rather have a good receiver and spend less on dvd, because with movies the receiver is going to be much better at audio and most times better with audio for music too.