upintheair,
You can not put the Vision cockpit in the XRS. You can up grade to DU885 and Batch 3, which is as close as you can get on the older Globals. We did it on one of our Globals a few years ago. Cost is around $850k, but you can get it for less if you negotiate it while doing larger mx. We did ours during the 8C and paid around $650K. This was at a Bombardier Service Center..
j