Welcome to the forum!
What is the model number of your Samsung system? I'm not convinced that you couldn't use those speakers with a new receiver (minus the subwoofer, though, if it's a passive sub). I know that the listed impedance is lower than what a lot of receivers are rated at, especially in the $500 or less range, but most receivers have protection circuitry to prevent damage due to current draw. How much current is provided by the amplifiers is dependent on the volume level and impedance of the speakers. If you aren't playing your music/movies very loud, I'd be shocked if a separate receiver from a quality vendor (like Pioneer, Denon, Onkyo, etc.) couldn't handle the load.
What do others here think?