Id like to get one myself. I have a 17P which is great for wood and leaves, but stinks for gravel because, like you said, you have to shovel it out. I drilled some holes in the bed of it to drain the water out.
Here are some pics of my 18 cart sans decals. I went ahead and pulled them off and ordered some "15" decals thinking it would be like the ones above but instead I got the new cartoon looking decals that say "15" , same as the new "18" ones but only with the number "15" :S