I don't have my DVDs handy at the moment, but I got the quote online, I'm not sure if it entirely accurate.
Han: "No, the entire Imperial fleet couldn't have done this. It would take a
thousand ships massing a lot more firepower than has ever existed."
Yet, later on, General Dodonna informs the rebel pilots who about to fly off in a desperate attempt to destroy the Death Star, that is carries a firepower "Greater than Half the Starfleet".
The DS Superlaser weilds energies in excess of 10^32 Joules. (The gravitational binding energy of an Earth-like Planet) Now, supposing for a lower limit that the Deathstar's power simply equals that of their entire navy, we devide this by the earlier stated number of Star Destroyers (25 000) and get 4 * 10^27 Joules. (That's
956 million gigatons) The closer we go to Deathstar = Half the Fleet, the higer that number gets. Even if each ship could only apply 1% of that energy to their weapons, that still gives them millions of Gigatons of firepower, to Trek's Kilo/Mega figures.
Who do you think is a more reliable source regarding the strength of the Imperial navy - A Smuggler having an immediate reaction to seeing an asteroid field where there was once a planet, or a General who is preparing his soldiers for battle?
Or, we could just stick with demonstrated Imperial Firepower like Base-Delta-Zero operations, Numerous asteroid destructions, Scaling down the Power/Volume ratio of the Death Star to the size of more common warships. It all leads to immense firepower on the Side of Wars.
This is one case; not the norm. In most episodes of ST the ships will square off many thousands of kilometers.
http://st-v-sw.net/STSWwounded.html
Even the death star's main cannon's range of 77,000 km is not a match for a long-range bombardment.
In response to anything you try to cite from Mister Anderson's website, I counter by directing you to Mister Wong's:
http://www.stardestroyer.net/Empire/index.html
Read thuroughly under "Technology" and "Tactics" to see his appraisals of the Two sides present, and under "Hate Mail" to see his arguments with Mister Anderson. You should find the results most enlightening.