I would personally like the old one to come back, it was a nice ship to fly and one of my favourite gunboats to see flying around. Was rather small and agile but very weak armor.
Thougths
So, after a bit of sleep, here are my suggestions.
Hathor - Replace the current model with the suggested "Old" gunboat
Leave the current Border Worlds gunboat alone. It looks more durable than the Conference, which is in keeping with the BW line.
The current Conference could be re-crafted to make a Researcher vessel, leaving the Corvo as a warship. Switch the Corvo label and description to this ship, and the Corvo can become an actual warship. Add 10k to the core, double the cargo hold and add a hyperspace equipment bay and you have a vehicle that can carry the hyperspace scanner (special sensors), but cannot jump due to power core limitations or scan by itself because of insufficient fuel carrying capacity. This would disassociate the Researcher functions from the Zoner ship line.
![[Image: th_Montante_zps3c88c1f9.png]](http://s216.photobucket.com/user/JinxTT/media/Montante_zps3c88c1f9.png.html)