What stand is recommended with this soft box (paired w White Lighting)?
A really heavy one, perhaps even a cinema stand. However, the stand may be the least of your problems.
Although this is a amazing softbox, and just the thing for evenly lighting groups, it's too heavy for the White Lightning's mount and will require serious counterweighting to keep it from overpowering the White Lightning tilt clamp and pointing at the floor.
I attached 2 - 3/8" x 4' steel rods to the umbrella connectors on top of the strobe and used a 5# boom weight, slid out nearly to the end in order to balance this. The whole package is workable on a low stand but when cranked up over 5 or 6' in the air it requires extensive sandbagging of the stand legs and it still sways a bit even on my heaviest stand.
This configuration worked, but I spent the entire shoot expecting it to come crashing down.
I'm currently looking at various mounting options including a customized version of the Kacey Enterprises (they have a web site) Einstein bracket to address this issue and make this and other heavy boxes practical on Buff lights.
To reiterate, this is an utterly amazing light box, with beautiful and even light and Profotos renowned build quality. If I can find a practical mounting solution for Buff lights I'll be back for a another.