Unfortunately i cannot find the set here I did only find separate bookshelf/floorstanding wharfedale here.how much are wharfedale diamond 100 or 200 5.1 packs where you live? In NZ they are priced really well.
A good 5.1set is better than a bad 2.0 set for sure. If you spend lets say 100 bucks for a pair of "Stereo" speakers and you spend 1000$ for a 5.1 set I'm pretty sure the 5.1 set is better also to listen to music but will offer you full surround sound while watching movies too... But if you compare a 1000$ 5.1 set with a 1000$ pair of stereo speakers most likely the later will have a much better sound...I simply don't believe that those 5.1 sets can compete with bookshelf/floor-standing speakers.