Dfine2 is part of the Nik suite which is great and also works as a LR/PS plugin. Dfine is the NR software and yes, it's brilliant. It also includes Silver Efex for B&W conversion (again, brilliant) and others.
I really don't like the in-camera NR particularly at high ISO.
The in-camera RAW conversion is excellent but it's a PITA doing a lot of them. Now I'm on LR5, which seems to read the RAW files of the X-Trans sensor much better than 4 did, I'm shooting RAW only and I use the Fuji film simulation (Velvia, Provia, Monochrome etc) within LR which gives you the best of both worlds.
So far based on last night's pictures, the Fuji Monochrome conversion profile in LR gave me the best results compared to LR's own B&W conversion and also the venerable Silver Efex. It's damn good.
Last night did show up a few shortcomings of the X-F1 - manual focus isn't really practical with moving subjects as the controls are fiddly.
Once or twice in manual mode (jog dial on back for shutter, thumb wheel for aperture) it wouldn't switch shutter speed until I clicked the thumbwheel to alternate the controls and then clicked back. No biggie, just mildly annoying.
I also noticed that the preview of image just shot immediately after the shutter goes off is shown at massively low/noisy res until a few seconds later, presumably because it's a low res preview whilst the full res is written to SD card - suspect I need a faster memory card as it was pretty sluggish saving the files. No real problem, just don't hit delete if your're chimping until you've seen the full version!
Also with LED stagelights, it can generate a weird halo/inverse shadow effect - see below for one from the cutting room floor:
20140510-DSCF4186.jpg by
landwomble, on Flickr
This has all got me thinking that an X100 would be a great sleeper gig camera however