I've run Futaba 9650's and various other cheaper brands and find the Savox SH1257mg better than anything else.
2kg is plenty for a micro, and the holding power of this Savox servo (which is not given in specs) is far better than anything except the Futabas that I have used. But the Futabas are much more expensive
and noticably slower.
Savox SH1257mg all the way for me