JPEG. JPEG, JPEG, JPEG, JPEG, JPEG... Specifically, JPEG fine mode or whatever setting has highest res. This is true for any digital camera including the X100, which I don't own and will never own. Jpeg. Jpeg, jpeg, jpeg, jpeg, jpeg - unless you want to spend more time twaddling away hours in front of a computer futzing with basic adjustments that nobody but maybe you will notice when you pixel peep, that the camera's internal computer does automatically in a nanosecond. Hey, let me fix that tiny bit of unnoticeable barrel distortion manually in a pricey RAW processor now that they (finally) have that the "module" for this lens, that the camera corrects automatically in an instant! Sounds like fun. Then after I export it to PDD, let me open it in Photoshop to fine tune it further! Pure silliness.
Pixel peeping is a form of OCD that camera manufactures fed into when they started making cameras with RAW "capabilities" after spending millions in time/money developing the "engines" for their cameras. I'm sure the engineers and marketers who first came up with the RAW "feature" had a nice laugh over a round or three of sake.
You are shooting 35mm "style". 35mm is for run and gun. The X100 is for "street photography". HCB's printer got the basics down - good contrast, saturation, to make a nice print. The camera does this for you, and Photoshop gives you everything you can possibly want to fine tune further. Who wants their hard drives clogged up with these giant raw files, not to mention the slowness with which they process depending on your computer because they're gigantic for what they are - still images? Ansel Adams shot large format landscapes. And he spend days, weeks perfecting a single print. This is a very different kind of photography from what a 35mm film or digital camera was intended. Photographers - esp. amateurs, seem to have lost sight of this. Shooting jpeg, I bang out scades of pics shooting jpeg and doing some minor adjusting in Photoshop - and truth be told I don't usually need this much power. RAW? Lol - just slows everything down by doing something manually that's, like, a zillion times slower than what your X100's internal processor does, that you paid a few hundred bucks for. It's there, you paid for it, put it to use.
Jpeg. Jpeg, jpeg, jpeg, jpeg, jpeg! For the love of god.
RAW? I'll concede maybe for the once in a great while shot where the lighing is especially crappy - one in 500 shots. Maybe - but not as your default shoting mode.
RAW just slows everything down. From write speeds, to transferring to your computer, to processing the image - 999 out of 1000 times for nothing.