^ Congratulations. Sounds like you got a pretty good deal. I love the images from that sensor!
Prior to me getting the K-50, the Fuji X-E2 was a camera that I was also considering. If Fuji stabilized all their lenses & guaranteed that all their future lenses will have stabilization, Fuji would be my first pick in mirroless. I would only buy the Fuji lenses & nothing else. Coming from an IBIS equipped Sony A200 DSLR, I was too spoiled by IBIS & that's why I went with the Pentax. It was also cheaper.
Typically, in lens image stabilization works a bit better than IBIS. However, the cost of a stabilized lens is more. The plus side of IBIS is the ability to add stabilization to any lens, but it does have its limitations as well. I tend to favor IBIS more for the convenience, but I do know that in lens stabilization ultimately beats IBIS if you compare the exact same focal lengths. In the end, you give up something for something, but it's all good.