I think this will quite quickly boil down to straight fight between BIH and Draken/Airbus. Airbus have a huge amount of innovation and 'novelty' that they can bring to the table, and Draken have a proven pedigree of delievering SAR training (as Cobham and now as Draken). However BIH have been providing a solid SAR service with a good rep (as far as I know). I think any bid involving Airbus will be difficult to beat on sheer price alone, but reputation counts for a lot and BIH have provided the service very well, which has to count for a lot (one would hope!).
My money is on Draken personally as I have a good idea (having worked with them several times) how Airbus think - they will have done their homework on this one. In any event, it will be a great watch...popcorn at the ready.