It seems to me as well, but some people still prefer
Bulgaria (i've also many friends which have chosen to setup the company and their fiscal residency in Sofia, Bansko or Plovdiv and I'm trying to understand why).
Also Bulgaria (except Sofia) seems to have less good flights connections than other cities in Romania, like Timisoara, Bacau, Iasi and Cluj.
I heard good stuff about Brasov, but since there isn't an airport and it's far away from the border too, i would choose probably Timisoara.
Edit the flights connection with Timisoara are very good with italy, but quite limited with other countries.