Rohan
First of all good luck in your future career.
as for your questions
1) Though it shouldn't matter where you did your training on ab-initio as the CAA or now JAR monitor them regularly for standards.
But you should look at which schools have airline cadets in them. This is a good indicator that they have what the airlines are looking for. For instance OATS are funneling the cream of the crop straight into Ryanair at present. Not bad for a first job and less than 200hrs.
2) If your going to do it then go for the full intergrated course. Why?. Well how many airlines do upgrade courses that you know of?