aegir would be the one to get if you have very efficient speakers, something above 92db or so. If you buy Aegirs with inefficient speakers you will be much more likely to clip. Vidars should do a better job driving inefficient speakers (200 watts per channel into 4 ohms).
SQ wise, from what I understand, Aegir is more articulate/airy in the highs, where Vidars is less so but may provide more bass impact. as always YMMV.
SQ wise, from what I understand, Aegir is more articulate/airy in the highs, where Vidars is less so but may provide more bass impact. as always YMMV.