SimCity 4 is unquestionably the best game of the series - not least because it offers all sorts of options for customization and modification. I wanted to make something unique to put into my cities and settled on modelling a massive satellite radio dish:

Modelled in 3dsmax 7.0, rendered with Mental Ray using plenty of ambient occlusion shaders. It was exported with a slightly modified version of the SimCity 4 BAT tools.

I posted the modification to Simtropolis, a popular SimCity community site. It is listed on their STEX catalogue, here. I'm happy to see it has been a pretty popular download, currently rated "95%", downloaded over 3,500 times and included in Simtropolis' STEX Collector's Edition CD #1. If you're a SimCity fan, I can recommend this CD, its cheap and full of excellent mods for the game.