Be with them for 5 years PG,(or get the rating, make 1000,pay them and leave in between) right seat of a B1900 to A330 is too good to believe. It's a good opportunity. Fortunately we jet drivers have some options at the moment. It all depends how it goes with you, whether they improve or detroriate with time etc.
I personally know 2500 hrs + TP guys with no prev command exp transition to 737 LHS, few of them were excellent and some had habits like kicking excessive rudder etc. again it depends on how well a person can adopt to speed and other changes in cockpit.
It's a game of demand & supply ! Today they just need Atpl, once they needed 2500+ on aircaft more than 75T and in the far futute it might be a min of 1000hrs on type ! Who knows...