I was in a similiar situation last year.......bye bye Beta Carves.
Which Atomic? They are all good
Try out the B5's in a 162 or even possibly a 172 if you want more stability and bigger turns going fast.
That was my style and I went for 172's but am 1 inch taller and 10-12lbs heavier than you.
Sometimes I wish I went shorter but mostly glad I went longer....especially in a few cms of cut up powder.....cuts like a hot knife through butter.
Most here will tend to recommend the 162 for you and they may be right.
The M11:B5's are more of a GS type ski and some say more forgiving.
Not sure about the M10's.