I'm going to guess that the Dynaudio 1.3SE are at least 89db effecient, and if so Melody I2A3 got a great write up by Ebaan at 6moons, enough so that I'll eventually give that a try myself.
If you like a sound that is fast, transparent, w/ excellent PRAT, tone & timbre than the Audo Zone AMP 1 gaincard is excellent choice...- but only 1 input.
A lot of nice integrated's in that price range, good luck.