Well it could seem strange at first glance but people seem to underestimate Ligue 1. Despite it not being as good as the PL, La Liga and Serie A it's not far away from the Bundesliga and it has great potential. Looking only at the demographics, size of the country, economy, potential etc. Ligue 1 should be just as big as the other leagues (or within a short distance to them). (No Russia comparisons as they don't have a big football culture compared to France, Germany, Britain, Italy, Spain, Netherlands, Portugal etc)
Apart from that PSG in it's current state is a interesting project, the owners are willing to invest, the city is wonderful, the economic aspect is not a problem either, possibilities for trophies and CL etc. It's not that bad again, especially not for a young talent as Pastore who still needs to prove himself a bit more before he takes the last big step (PL, La Liga)