As a fairly new player still, I've been browsing different builds for ships and squadrons to give myself ideas and to figure out why some upgrades see more use than others. I am rather fond of Interceptors, even if they require a small pile of upgrades to really make them the tournament staple several of the aces seem to be.
One thing I have noticed is that there doesn't seem to be an obvious pick between the modifications used alongside autothrusters, and I see stealth device as often as shield/hull upgrade.
So what do people use and why? I am running under the assumption that the second modification slot is being taken up by Autothrusters, as that seems to be more or less universal.