I agree buy Sthil a -026,024,these are old models so might not be still available but are still widely used, if you can, as you can get all the spares for them,and are fairly easy to fix, with only one Torx tool bit ;D.
I would look on ebay though as all tools "is it just tools these days" are really expensive in the Euro zone,saying all this, it,s all down to how much you are going to use the chainsaw ?as the cost of a replacement Sthil piston and rings would be the same as a  cheepo petrol from Carrefour.
It has taken me years to collect my tools ,but apart from drills which if you are going to run to distruction ie using for mixing plaster etc even the best will die...would go with best you can afford cos the cheppos are built not to last.
all the best
Phil