DLMD,
I am not an INSEAD expert but screened as you did their stats. I also have lots of friends who are alumn. By the way this is my n1 pick.
IMO Insead is not the best idea to join IBanking if you are not originally from this financial field. This is mainly a consulting oriented MBA with a really broad content and a strong recognition in Europe, not in the US.
If you plan to work in Europe and get into an European programme, the sole place to do real finance is London, then it is better to join LBS, another flagship, as you are already on the spot, knowing that IBs recruiters in London are tightly linked with LBS, for sure better than they are with Insead.
Eventually if IB is your dream job, definitely choose to go to the US.
Example : my best friend and his wife are students at Wharton, and current interns at GS and MSDW ; they had 4 offers all from IBs without any pb. Moreover IBs in the US or in London will always select the best brandnames and are used recruiting at H, W, Chicago, Columbia.