For a situation like this, a pair of Mirage Omnisat v2 SATs and coordinating Omni S8 or S10 subwoofer would be about perfect. The satellites can mount on the wall, eliminating the danger of a crawling baby pulling a minimonitor off a stand and thunking her on her punky little head. The grilles are metal mesh, resistant to curious, poking fingers. The omnidirectional radiating pattern is great at filling larger living spaces from small sources. The Omnisat gets really close to being a point source. At the same time, the sound is very clear with excellent midrange.
Best of all, the parts and build quality and sound quality are great--way, way better than Bose, and generally better than similar-priced sub/sat systems. The sat enclosures are inert and shaped to avoid standing waves. Tweeter is a cloth surround titanium dome and mid/woofer is titanium vapor deposit on polypropylene with butyl surround. Handling capacity is 150 w.
Get a consumer-friendly combi player and receiver and you're there. I recommend using the high level (spkr) connections to the sub and from there out to the sats. Kimber TC-4 or TC-8 terminated in bananas should be a good match.
Separate disk player and receiver shouldn't really be more complicated than a single unit. It just requires one more AC outlet and one pair of interconnects.
I use a 2-channel Mirage Omnisat system in the music-only living room, and it's a very engaging and involving system. It energizes the room the way instruments and voices would, it's unobtrusive with good resolution. It excels on jazz and chamber music and acquits itself well with orchestral and big band music too. Voice is almost spooky-real and should work really well for TV/DVD sources.