Personally I hold a strong view that cheap 5.1 systems are a total waste of time, I have never heard one that didn’t sound anything other than a toy. There is no feeling of being ‘surrounded’, you typically have one of the rear speakers so close to your ear that occasionally during a film there is a noise, and you think ‘what was that?….oh yeah…. surround sound’
Next time you go to a cinema, listen out for how much surround sound information there is in a typical film…..not much IMHO. A decent pair of active 2 ch. speakers will sound so much better and provide a much greater sense of space than any surround sound system. It will also provide realistic bass, which does not sound totally disconnected to the rest of the audio. You can also avoid descending into remote control switching hell, just drive the active speakers from the headphone jack and no additional boxes or remotes.
Unless you have a big budget, and a big room to get the rear speakers a decent distance from the viewers, I would not bother…they are toys.