In Portugal we have this brands like bullit, mash, mutt and brixton. I think is also something relatively new in Portugal so the service sometimes can also be not so good, my friends said that there is better to buy in a dealer that also offers good service like you mention, so at the end I think is similar maybe with romet (the moto models are very similar) or brixton in Poland. My friends said the the motors are getting better as you mention and the 4t motors have good durability. I live in Gdansk and I hope soon I can find a dealer around here that sells brixton Motocykle 3 City Sp. z o.o I see this one have good opinion.
In last case I might buy Romet Scmb 125 to start as they dont sell anymore romet ogar legend 125. I think around Gdansk they have some places with good service.
One more question. 125 motos need to go to periodic inspeaction like the cars and if so the moto need to be like original without any changes? In Portugal for now there is no such a thing but they plan to implement this.