New amp for Vandersteen 2CE


Hoping you can help me narrow down my choices for a new amp for my Vandersteen 2CE speakers.  I have been using a pair of Adcom GFA565 monoblocks.  They have ridiculous amounts of power, but I don't come anywhere near using it all and I would like a little more clarity in the midrange.  I have two used amps I'm considering - a McCormack DNA 0.5 and a Pass Labs Aleph 5.  Another option would be a fully restored/upgraded Adcom 535/545/555.  Source is a Sonos Connect with a passive attenuator for volume control.
Thanks for the help!
craig2112
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.
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.