I've always found the Ninkas to be a little too polite. Aktiv certainly helped. Not until run by a Unidisk/Exotik/5125 have I heard them sound really lively.
I recently changed my Wakonda to a later production run, and it's quite smooth, but recessed. Some scm7s sounded really good on it, but were ever so light in the bass for my room - hence the desire for 12s.
It's my understanding that the 5103 really improves things nicely and has a little more dance over even the Kairn. Right now, I could swing that or a pair of 12s for about the same cost.
BTW - I'm sure you've heard the 20s - gorgeous. If you can find some Klouts to power them, simply amazing! Though the 35s are more efficient.
Would love to ditch the Wakonda/Genki and my DVD for a Unidisk SC and add a 5125 later .... one can aspire.
Cheers,
KP