I will say that I recently have been having a lot of fun with the excellent (if not exactly professional) Yongnuo IV's.
These guys will only set you back about $70 each, so you can grab three fo them and a transmitter for less than you would pay for a mid level Nikon speed light. The trigger balances nicely on my X-E2's diminutive frame and lets me set the power and zoom of each light remotely from my camera. The main thing to keep in mind with these flashes is that if you fire them on full power over and over again, they probably aren't going to last very long. That said, if you just want to tool around a bit with off camera flash while you wait on Fuji to put out their own professional grade (and likely much more expensive) line, these guys are a great bet.
Here's a link explaining how they work:
http://www.davidpartington.com/m43/2015/01/03/yongnuo-yn560-iv-speedlite-review/