well, didn't hear them with SHL5 but with Rockport Mira. Yes a Mira with a 4ohm load and 89db..... and the cs300 makes the Mira sing with joy. as a result, cs300 landed in my room but not the Mira (as the latter is beyond my reach at that point of time). pls note that leben is not as fine as lavardin in terms of performance.
btw, my target is the Rockport Mira if I got the space to accommodate it
to add: see the numbers of award that the cs300 (normal) has won; it does say something abt this integrated