Gents,
As many of you have already pointed out, I find it is 'horses for courses' when it come to picking my favorite ship.
IMHO, for small parties; 3 to 4 PCs, the old scout/courier is the way to go. No need for NPCs to fill other crew spots; even a Beowulf would require a few more hands. The IISS' Detached Duty Office is a GM's dream come true. All the plot hooks, pushes, and pulls you could ever want. The PCs can do some trading, some snooping, and lots of putzing about.
I always found the old Beowulf's one-parsec legs limiting.
The Marava is nice, although you can't make an honest living with it!
In merc campaigns, I found the patrol cruiser and Fiery too small and the Merc cruiser too big. I used HG2 to build a 600dTon variety that carried both a nice punch and a few troops.
Finally, for a group of merchantile minded PCs who wanted a fighting chance to trade their way across the Marches, I designed a 300dTon, jump2 ship that they enjoyed very much.
As for small craft, the modular cutter all the way. Fast, big, and it can become whatever you need it to be.
Sincerely,
Larsen