Instead if guessing it is pretty easy to take a look at the file and do the numbers and then judge...
The basic truth is this... where Value is taking DPS, range and mass into consideration
Beam weapon Tier 1 (not the tier 0 one)
Cost 32, Accuracy 100%, Damage 3, Cool down 5, Range 800, Mass 14 DPS 0.6, Value 13.68
Kinetic weapon Tier 1
Cost 7, Accuracy 80%, Damage 1, Cool down 4, Range 600, Mass 24 DPS 0.2, Value 2
Cost 23, Accuracy 80%, Damage 8, Cool down 4, Range 600, Mass 24 DPS 1.6, Value 16
Missile weapon Tier 1
Cost 30, Accuracy 90%, Damage 6, Cool down 8, Range 1100, Mass 18 DPS 0.68, Value 16.8
Please make your own judgement...
Adding modules that make any type better is not worth considering since they all get those modules in some way and they are not really balanced well either. There is a significant different in cost between the weapons but it is very hard to believe this will make much impact, you are still in most cases going to pay for defensive components, engines and so on anyway so the cost can still be relatively close.