The only problem with stargate that has always bugged me is that in the first episode of season 2 (or the last on in season 1, can't remember) that the nukes that were 2000 mega tons each did nothing to the hitak ships
The asguard beam weapons are a little bit if a bad idea, you have seen them cut a Ori ship to peices an then that mystery ship in that last episode it barly made a dent an not to mention what it was able to to to a goauld mother ship.