Roland the link answers all those questions and ticks all the boxes. Did you read the link? top speed 480 kts.
Crew comfort? This is the military we're talking about here not Virgin Atlantic lol and I suspect without admittedly having been in one that the comfort is fine (P3'S and Atlantiques have managed fine) This is a modern aircraft built in Europe, certified, used all over the world and ready to roll off the production line into service at a fraction of the cost.
If the politicans aren't interested in that I'd be very surprised.