DHCs, and Single beams are balanced well. If I can score top damage on a TSI premade with a beam tacxcelsior and not have to realistically worrying about dying in my chosen ship then the power is there. [...]
Those numbers tell nothing. Really, nothing. If you do 500 k damage to a target and it does not die, then your dps was too low to make a difference. Do 60 k damage to the same target and have a kill, and you win. You need to look at what you kill, not at those numbers.
And that's sort of what happens in a SBA/DHC comparison.
But I guess you, being so new, just don't know that yet, right.