X100 users: PP question:

I use Lightroom. Lightroom has a lens correction preset that works well.

I never use jpegs. The raw files from the X100 are some of the best I've seen. The XP 1 and D700 raw files are a bit better, but not by much. I know many prefer jpegs and I understand their point of view. I was trained decades ago never to discard original data until I knew I didn't need it any more. I'm just stuck in that mind set.

One nice feature of the X100 is you can create different jpeg versions of one image using the in-camera software.

You could shoot raw plus jpeg for a while and make your own judgement.

I use B&W prests I've created in Lightroom. I should try the Silver Efex Pro plugin some day.