AQ Cheetah is one of the best values amongst all of the different analogue interconnects. Its sound is refined, musical, fast, accurate and a host of other positive attributes. I've owned both Niagara and Cheetah and while there are several refinements that I noticed over time with Niagara, I can tell you from personal experience that I was extremely happy and impressed with both. The only major jump that gave me proportional return on investement was the jump beyond Cheetah to Sky. To that end, if you cannot or don't want the additional cost of Sky, careful A-B-A listening (at least in my setup and others I heard) showed me just how close Niagara and Sky truly were. My 2 cents...