On the C5's: I agree with most of Semi's comments however there are 2 different versions of the C5's. The second iteration improved the efficiency a small bit. (86db/1watt/1meter vs. 83). They still need lots of current though. My version had the tweeters replaced to the current Esotar 2 by Dynaudio USA which increases both the focus and extension of the highs.
If I had to sight a weakness- it is the macro dynamics but the strengths more than make up for this IMO.
If I had to sight a weakness- it is the macro dynamics but the strengths more than make up for this IMO.