Remember that Dynafit are going down the “insert” route. Both skis have inserts for heels and toes so you need the longer adjust of the Comfort/FT/ST binding which immediately adds some extra weight you may not be interested in. I think Dynafit’s marketing group is triumphing over reason here myself. The inserts themselves add 50 grammes per ski
I’ve skied the Mustagh Ata and it is a really good ski but they have had some delamination issues, all handled under the Dynafit guarantee (and beyond in some cases). Not a ski for steep icy conditions or short radius turns, ditto for the Movement Logic.
I think the Manaslu is too wide for most European skiing conditions. I would consider something in the <90mm range and personally for your needs would look more for 80-85mm underfoot. There are days when 90-100mm is nice: crusty snow, superlight powder but I’ve not seen such light powder conditions to justify such a ski for touring in France since Dec.2009. Otherwise you meet such a range of snow from hardpack to ice to mank to powder all in the space of 1000m of vertical. You need a ski that can hold an edge on traverses, zip round near mogul conditions in forest trails, cut through crud and turn in heavy powder. I’m personally not traumatized by crust as you can normally traverse to better conditions.
I would also consider the 7 Summits and variants (Guide etc) which is a great all purpose touring ski with not too much side cut and I’ve seen some good deals. It can be had with or without inserts (1435g/178cm/80mm waist without inserts, it loses 2mm around the waist with inserts but is lighter). In a similar vein the Dynastar Powder (82mm - 1435g/178cm) and Movement Iki are probably slightly more versatile than the 7 Summits.
I’ve seen the Powder for under 400 euros which is a good deal for a good ski once again made in the Arve (Chamonix) valley and this would almost certainly be my choice.