Dan D'Agostino S250 MxV enough power for Wilson Audio Alexia V

Do you think the Dan D'Agostino S250 MxV will provide enough power at 250 watts stereo for the Wilson Audio Alexia V speakers? 

Speakers say 90 dB @ 1 Watt @ 1 Meter @ 1kHZ.  But at 1kHZ the speakers impedance is 6 ohms.  What happens to the sensitivity at 85 HZ when the speaker impedance is closer to 2.5 ohms?  I guess at 2 ohms the S250 says it will put out 1,000 watts.