Any way you look at it, you need to reduce the resolution. I do so for every coin I post anywhere online; depending on the photo host, you can put up some pretty darn big images. The CCF Gallery allows 800 pixels in size; at reduced resolution that's only 200-250kb.
The best thing about a bicycle is that it uses no gasoline, therefore the chance of fiery death is greatly reduced.
First Catman, then Gary Burke and now Bigg Fredd - there's one heck of a coin club in Heaven.