Upload & Sell: On
As a number here have said:
The killer feature on Olympus m4/3 bodies is IBIS
Can't argue with that. I had the OM-D, but it needed a grip to feel secure, and that adds size and bulk. I am presently using the GX1 (but with the RRS L-bracket, only using the bottom part, as it continues the contour of the camera's grip and it transforms the ergonomics), and the usual suspects, lenses-wise (7–14, 12/2, 20/1.7, 45/1.8), but none of these have stabilisation.
IBIS really works well on the OM-D—but you can't easily select the lowest shutter speed before auto ISO kicks in (or at least you couldn't with the firmware I was using).
All this is a preamble to introduce the Fuji X-E1, though. I think that this, finally, will be what I have been looking for: smallish form factor (but not too small); fast and excellent primes (the new 21 EFOV one will be among the first purchases, as will be the 30/1.4). I like the built-in decent EVF (that is the aspect of the GX1 I least like, though it is very handy, as it tilts), I like Fuji JPEG rendering and colour, and I LOVE the fact that is does not have an AA filter, and that the sensor is APS-C—with the 30/1/4, should have very controllable DOF. And we all know how well the X-Trans sensor performs at higher ISOs.
Apart from no IBIS and no tilt-out back, no downsides, for me.
And like the µ4/3rd's bodies, the X-E1 can take a huge variety of alt lenses, too. It's a great time to be a shooter (coming from FF Nikons and Sonys). Do the FF bodies produce better images, ultimately? Yes, definitely, but the fact is the smaller lighter systems mean I have, for the first time, a camera with me at all times. That's the #1 plus.