I use AOMAIS SPORT II. Never tried the other ones, so I can only tell my experience of using this very speaker. It costs around 50$, has a nice set of drivers that provide 20W full-bodied stereo sound and inbuilt microphone for hands-free calling. I usually take it to the seaside as it's also waterproof.
1x Bowers and wilkins center speaker (not sure on exact model) £20
Denon Avr 1604 5:1 av receiver £30
It is missing an active subwoofer but to be perfectly honest it doesnt need one, i use it for dj'ing also as the 5 channel direct setting is a god send for full 5 speaker stereo without any speaker delay from dolby surround settings.
just do some research and go hunting for some deals. you really can put together a lovely system