Oof, that website isn't fun to navigate. As for the concepts, I looked at most of them and it just looks like they tried slapping fanmade logos on most of the helmets.
Although I did see one for the Vikings that was an all gold helmet. Off topic, but I do think it would be interesting to see a color-swapped gold vikings uniform with purple trim.
As for our helmets, I like where we're at. The Block M is such a unique design and maroon and gold complement each other so well that it's pretty much always looked good on our helmets.