Used to have the AW250, but i bought it used and it kept blowing fuses for some reason, so i sold it and bought the Bryston 7b st monoblocks, im sorry to say that except foe the bass i prefered the Electrocompaniet in every way..., instruments had a greater sense of timber and a more solid tube lke presentation. The brystons by comparison are sterile sounding, but with very solid bass. my speakers were Proac Response 3's
I remember reading a review of the aw 220, when bridged with an upgraded power chord they came very close to the sound quality of the Nemo monoblocks!!!
Assuming you dont end up with the quality issues i has id say electrocompaniet is the way to go, and the aw220's might indeed sound better than the aw250, unless you really need the power.