Upload & Sell: Off
I'm a longtime 5D2 + 35L user, for professional and personal use.
Just got an XE-1 + 35 1.4 as a second camera, with plans for the 18mm.
Coming from a DSLR takes adjusting, some of it very frustrating. By far the primary issue is the AF system on the X cameras as currently implemented. At close, medium contrast, or low light-- AF has a strong tendency to hunt, never acquire, or land on the obvious background. It's the one thing that probably limits the number of scenarios in which I'll be able to use the XE for professional purposes.
Which is too bad, because it's the perfect sized system, and the lenses are incredible. I've only done preliminary IQ experimenting, but it looks quite good. Room for improvement? Sure. But my editors-- at major publications-- will not think twice about accepting these images. If Fuji could get the camera to focus as fast/accurate as the center AF point on my 5Dmk2, and give me better video control... I'd actually consider going all X. Specially in a few generations of IQ/Resolution/RAW conversion enhancements. For now, the X is not quite ready for primetime.
I was in the same boat as the OP and subsequent posters: Second camera, small-size being primary. For me, the X100 just didn't have the resolution I wanted, whereas the XE did. I find 35mm my favorite FL, so that was a point for the X100, but I don't mind because I actually enjoy getting 28/50 equivs with the XE.
Bottom line is that I don't think I'd pocket either X100 or XE, so I went with the XE for the versatility. I also liked the idea of being able to put some of what I spend into value-holding (or at least value-not-vanishing-overnight) glass as I build the system.
But also know that Canon EOS Digital is mature compared to Fuji X. This shows in annoying places: no custom minimum SS when in auto ISO or Aperture priority, no exposure simulation via EVF or LCD, slower overall startup to shoot, etc.
I plan to give the XE a real workout over a few coming assignments. And I bought an EOS to X converter so I can use my older MF lenses on the X.
Just know you're