I would say a mix of Military and freighter with some kick ass weapons. It could def be set up as a military class cruiser though. I wanted to show off the weapons I had planned for it, but with the scale you really cant see them.
I haven't played the game much but from the experience I've had with it I'd say that fits in pretty well. You can always try out the 14-day trial if you have some spare time & bandwith (the game client is ~2.5Gb)