Boulder 2160 vs Dan D'Agostino S250MxV

I’m looking at these 2 amps as well and will be interested to see what you choose and why. Heard great things about both amps. I lean toward the D’Agostino personally,  it really draws me in with texture, tone and other nuances. Boulder seems more “live” I guess but only heard it briefly once. 

@arcticdeth Alexia V 4 ohm speaker and the S250 is rated at 500 watts at 4 ohm.  90 dB efficient.  Seems like that would give you some headroom.  I'm now leaning toward the Progression S350 as it gives me some budget for a Dan D'Agostino Progression Preamp. 

Think I'm going to try the Dan D'Agostino S250. 

Let me know how you like it.