New amp for Vandersteen 2CE

If you're staying solid state, the Pass would be my first recommendation.

But the 2CEs work really well with tube amplifiers (we have a lot of customers using them), and if you "would like a little more clarity in the midrange" as you put it a tube amplifier is going to be a no-brainer for this speaker. You will need at least 60 watts in most rooms. 

Thanks Atmasphere. I have tube guitar amps, but haven’t gone to tubes in my audio system. For now exposed tubes seem like a problem waiting to happen - kids.

Rotel is a nice match for Vandy speakers.

CJ tube amp with a cage..nearly kid proof...
the Khtargo does work very well w Vandy..Brother in law running that w Candela pre and Bluesound streamer/ DAC.

craig2112, 
if you are going to stick with solid-state, my recommendation would be to stick with a bipolar (BJT) output stage power amp (like the DNA 0.5 you have in your list). 
I see that you've been listening to a BJT output stage power amp (your Adcom GFAxxx) all this while & staying with that topology would be recommended. I think that BJT output stage power amps sound better than MOSFET (NOT intending to start a BJT vs MOSFET argument) but then each listener has their own preference. I think that BJTs are a much better current source (which is basically what an amplifier output stage is) & since BJTs have higher gain, fewer stages (less distortion & less noise) are required for a high(er) current power amp. 
Looking at the impedance & phase plot

http://www.stereophile.com/content/vandersteen-2ce-signature-loudspeaker-measurements#9XpubygHe0pY1BVW.97

the speaker is a fairly benign load (I can see why Atma-sphere says that a lot of his customers use his OTL power amp with this speaker) but it is mildly taxing to the power amp hence ensuring that your new power amp has sufficient current at 4 Ohms (for the bass region where the speaker impedance is 4 Ohms & phase angle is mildly inductive & mostly capacitive) would be a good idea.