I have been reading alot of these posts lately and alot of people post things saying this is hyperbole, that is unsubstantiated. So I try to keep posts susbstantiated. People want to talk about strength feats.
Vegeta trains at 460 times earth graivty while severely injured. He is doing 1 finger 1 armed pushups and alot of them. at 460 times gravity, that puts his weight at 30 tons. Bear in mind this was also right after namek so he was still extremely weak and not yet ss1. We all know Goku was much stronger than vegeta.
http://www.youtube.com/watch?v=E4zlmq_CUBU. Think about the strength he would have in GT. (Also, this totally destroys any notion that Ki does not augment physical strength.) Also, if you notice later in the same video, vegeta is able to jump quite high and move fastr than we can see. The amount of force it would take to accomplish these feats whilc carrying 30 tons is amazing. But a really a VERY low level feat considering the timeline of the series and how much more powerful he became. Remember, Z fighters don't manipulate gravity, so jumping 10 feet in the air at 30 tons requires a ridicouls amount of force. approximately 18,960,000,000,000 pounds of force (momentum = mass X speed). And remember, his legs would have had to absorb an equivalent amount of force when he landed. These are actual irrefutle numbers. That says nothing of how he was able to move that 30 tons fater than the eye can see. Now that isVegeta in base form, which had not even reached SS1. Imagine Goku's strengthwhen he was more powerful that original SS3 in base form and multiply it by his SS4 form. Consider that the reason we have not see definitive proof of Goku's limits is because he has none.
I have seen alot of people argue that Goku is a "high planet busting attack." Not sure where you come up with that analysis. Here it is plain as day. Vegeta easily destroys a planet when he was ridiculously weak.
http://www.youtube.com/watch?v=E4zlmq_CUBU. That attack wouldn't even register for Goku. He would not dodge it. He probably wouldn't even notice it. Same with Frieza. He destroyed a planet at 1% power with ease.
http://www.youtube.com/watch?v=E4zlmq_CUBU Is there even an argument to say a very weak Frieza can destroy a planet with ease, but Goku at SS4, couldn't do so much more than that? Thats sort of like arguing that a 1 megaton nuclear bomb will do the same amount of damage as a 500 megaton bomb because they are both the same size.
Goku is faster an light. THis video has some good analysis.
http://www.youtube.com/watch?v=69DezxYYaxs The best point is about Vegeta's final flash. Again, assuminge natural progression of the show, speed became impossible to measure. Popo is faster than lightning. the US Department of Energy gives the speed of lightning as 93,000 miles per second or half the speed of light. Namek Goku was much faster than Popo and his speed has greatly improved since then. For definitive and undisputable proof, we need only look at Brolly and Kid Buu. People make several arguments that Broly did not destroy a galaxy. I personally believe what I see.
http://www.youtube.com/watch?v=9DlXamubEc4 Just in ce you are wondering what you see being destroyeis excatly what a galaxy looks like.
http://www.google.com/imgres?num=10&hl=en&tbo=d&biw=1024&bih=595&tbm=isc... Others argue that Dragonball Z galaxies are much smaller than ours and that Broly took 40 years to destroy it due to time lapse. Thats fine. In the series, Namek is 4,000 light years away. So lets say that Namek and earth are on the far ends of the galaxy. That gives the galaxy a diameter of 4,000 light years (ours is approximately 120,000 light years). In order for Broly to travel the distance in the galaxy in 40 years. he would have had to travel approximately 314,000,000 times the speed of light for 40 years to do so all while delivering multiple planet and star buster attacks per second. For those of you who doubt it, Kid Buu did the same thing in much less time. Calculating his speed would be immeasurable. Goku in GT is much stronger and faster than Kid Buu. Thus, Goku's speed is immeasurable, certainly billions of times faster than light.
I do think that superman is tough, I just don't think he has the ability to stand up to Goku.