I am becoming a KC-390 fan ... but it seems to be in a different category to the other 2 contenders. It's also the most expensive option and would be overkill for SAR role.How about a cynical analysis. Both the Federal and Quebec governments have provided questionable funding to Bombardier's C-Series. In order to pacify Boeing from launching a protest, an order is placed for Superhornets. Thus, to keep Airbus from protesting, order some C-295s. Of course the only protest so far is coming from Embraer so maybe junior should order some KC-390s.
On a serious note, I favour the C-27J. SAR is time sensitive so the C-27J's superior speed is an advantage. It has better range and cargo capacity. It's commonality with the C-130J engines, glass cockpit, and pallets are additional advantages. Altogether these justify the higher price. That being said, junior will pick the cheapest plane, the C-295 even though the RCAF favours the C-27J. The RCAF brass could hardly be more pissed off with junior than they are already are.
C27J with its commonality with the C-130J is the obvious choice ... but then again the F-35 was the obvious choice to replace the Hornet.