I decided to resist and will buy an X10 fairly soon as the fixed lens of X100 would be a bit limiting for me I think, not really sure though...
The key factor is that you also have a 60D, when the shoot demands a more versatile camera. The X100 is the team-mate of my D700. When I know I will need the range of lenses, the D700 is the choice, but when I have nothing whatever in mind to shoot, the X100 is in my pocket or pouch. It weighs 445 g, enough to hold steady, but hardly noticeable in the pocket. I also carry it when doing people photography, whether on the street or chronicling the lives of friends. It is silent and nearly invisible.
Someone from Fuji once described it as a "professional photographer's personal camera" and that is no hype. I have no hesitation to shoot at ISO3200 and have tested at 12,800 with remarkably good results. It is not a CaNikon dSLR knock-off and it must be learned. Fuji assumes the shooter will be relatively advanced in camera operation, capable of reading a manual, and also know photography. There are no training wheels.
The combination of hybrid EVF/OVF plus LCD is brilliant. One can project a histogram onto all of the three and make precise exposure adjustments with the EC knob without removing you eye from the finder. I get amazingly consistent exposures using RAW, aperture priority, auto-ISO using the EC knob constantly for fine tuning. The viewfinders are highly configurable and can display a wealth of information. A tap on the Disp button toggles to a minimal display for shooting and toggles back for information as needed. One can move the "rangefinder" window to almost anyplace in the image area for focusing off centre. Its border turns green when focus is achieved, red if it misses. I find that I actually use the panoramic feature quite often.
For people photography, I find the 35mm focal length pretty much ideal. I can get close enough for intimate shots, without intruding. With the image quality it produces, even at high ISO settings, one can afford to crop if necessary. I got mine in early April and recently put together a gallery of initial results. Almost all are people shots and you will see that for the most part the camera is for all intents—invisible. EXIF data included. Most were shot under quite adverse lighting conditions. Flash was used rarely, and only for fill.
Fujifilm X100 - Street, Candid, Personal - Carry-Everywhere Camera.
