I ran my M22's with Axiom's A1400-8 and that beast did make them sound a little more open/airy but for that cost I think I can live with out it, well, for awhile longer anyway.
It could be you are just prefering your friends Dali's over the M22's. It could also be his room is better for acoustics than yours.
It could be the lack of an over emphasized bottom end that makes you feel the M22's are lacking and need more power, adding a sub to them will cure this or you can try turning up the bass control by 2-3 db.
