I use Maisto motor-bikes and some vehicles --like their Hummer.
I use Marvel Universe figures--the Hand ninja is now a COBRA ninja on my shelves, Toybiz Superhero Showdown figures work well, and some like Punisher can use Joe gear.
CORPS weapons work for some Joes.
Certain knock-off characters like Rambo, Robocop or Terminator work well--tese used to be carried by Zellers and are 3 3.4" scale. Cheaply made, but decent enough that they "fit" in.
There was a brief series of die-cast metal and plastic vehicles-- made by a company whose name I have long forgot--that featured an ATV, Dune buggy, a small jet, and a snowmobile.
The last one is PERFECT for Joes, and comes with a swappable weapon on its right-front nose. The snowmobile has a spring suspension and a rubber rear track--it bore quite a bit or resemblance to the Spytroops Polar Blast vehicle--although it was much sleeker.
They came with no figures and were not meant to have them-as far as the packaging was concerned.
The other vehicles, with the possible exception of the ATV were not quite suitable for figures.
The old Galoob Jonny Quest stuff works splendidly, and has a lot of variety to it. Some of it even ended up in the Joe line itself.
