I prefer HK in this demonstration but, having the minirig 3s, when paired in stereo mode they produce a well balanced, clear and wide soundstage that would beat HK sticks in my opinion. If you are buying minirigs and can't afford the full 2:1 or 2:2 setup, don't go for 1:1, go for a pair of minirig 3s. You don't need the sub for a great sound.
Minirig 3 + sub. Should compare a pair of Minirig Mini with sub - Minirig , a pair of Minirig 3 with sub and 2 Minirig 3 + 2 Minirig Mini + 2 subs - Minirig is so flexible with configuration. Harman Kardon SoundSticks 4 looses the appeal with the more enclosed bass.