I personally prefer the confidence line. I own the c1's and demoed the C2's in my home. If I could afford the upgrade I would do it. The confidence series is more open - detailed with a better soundstage (both in width and depth) in my opinion. I think the 5.4's are a little more forward (especially in the mid's) but also has a bit more 'punchy' bass in the low end (not bad mind you but more like the C4's).Your room will also play a big factor.
That's my opinion and would suggest if possible to demo both side by side so you can form your own opinion. Both are fantastic speakers in their price points.
That's my opinion and would suggest if possible to demo both side by side so you can form your own opinion. Both are fantastic speakers in their price points.