I will be using 3ds max, standard particle flow, maybe even legacy particles, and FumeFx.
Right now I'm just working on setting up different particle systems and seeing how they are reacting with FumeFx. As of now it seems that to get proper expansion I may go the route of instancing geometry in some form or another and using that to drive the FumeFx with an Object based source.
Here's a really quick preliminary test. I have put together about 3-4 different systems, but as of right now this one is looking the best.
This is just a FumeFx preview, not a render.
Low res sim, grid 500x200x200, spacing 2.0
obvious changes: quicker smoke dissipation and turbulence. as well as lower buoyancy maybe
and higher timescale/faster particle emission.
Will update when I get some time.