Vanesca Catallia Location: '\S/'CEV-Mirrodin Subject: N. Pearsal ► Project Candidates
A decent list you have there.
While Starfliers has past experience with a bustard we also know how pricey it is to operate one just by fuel and maintenance, not counting acquisition and crew training for a vessel that size.
The "Sagar-something" is that kind of ship sitting near Java right? Well I can see it size wise working but I have no personal experience with it nor do I have ties to the IMG to know input on those.
The "Fearless" is a solid choice. Zoners and Starfliers kind of work hand in hand to some degree for the charting and exploration aspect even if not directly. And is has some unique-ness to it.
Military Craft can be very hard to acquire, even damaged and demilitarised ships are almost impossible to get hold of in a legal way.
The 3 mentions that you gave seem reasonable each in their own way, at least speaking by sizes while each likely has a different standard of maintenance and operation cost.