I am considering where to submit a recently finished preprint, and one of the best fits is a journal associated with the country where I'm working. That is, I'm a postdoc in one of main cities of X-land, and the jounal is called 'X-land Jounrnal of Mathematics'. Is the connection an argument in favour or against publishing there?
The arguemnts for publishing in XJM are, I think, quite natural: given that I'm working in X-land, I want other X-ians to be interested in my work, and they're perhaps fractionally more likely to have a look at XJM than YJM for Y != X. Assuming that publishing a paper in a journal is mutually beneficial, it stands to reason that I'd be happier to help XJM than a random other journal (even if infinitesimally so).
On the other hand, I have heard arguments in the opposite direction. The key worry is that the paper may be taken less seriously, and some slight academic nepotism might be suspected. That is, someone could see the publication and think it was just published because XJM looks more favourably on papers sent from X.
Are any of these concerns valid? If given a choice between publishing in a "local" journal, or an equally good "non-local" journal, which is a better idea? Or is it just the same, and I'm massively overthinking?
The field is pure mathematics. I don't want to name names, but the population of X is of the order of 10 mln. I realise the points "For" are very minor, and the arguments "Against" are probably minor too. I'm not originally from X, but would gladly hear how the answer would change if I were.