except for fighters sucking.
seriously though, consider this. shielding is based on \'mass\' (Block count), not \'volume\'(Size). If you have lots of extra space, it is not truly wasted, because that is a place that is NOT filled with blocks to attenuate your shielding.
As far as decent arms/armament are concerned, the easiest way is to save it to the catalog and then go beat up some pirates and pirate stations. If you succeed easily, you are strong enough. If you don\'t, figure out where you went wrong, re-buy your (now wrecked) ship from the catalog, and start stuffing more guns and shields into your empty space.
as far as competing PVP with other players, right now that\'s a bit up in the air. It depends on the size of your opponent as well as the server\'s level of competition.