Most of the articles I read used Kodak Tri-x so that is what I used to.
Using the Massive Dev chart app on my iphone http://www.digitaltruth.com/ I determined that I needed to develop for 10 minutes in ilfotec ddx 1+4 if I pushed the film from 400 to 800 which I thought was a good starting point just incase pushing it any faster may result in a ruined negative.
The weather today here in the South Wales valleys was pretty poor, dark and wet so it needed at least 800 iso.
I really like the results I am getting using ilfotec ddx it seems to give a really good balance between sharpness/contrast and minimal grain.
I will try pushing it to 1600 or 3200 next time as I like grain in my images and 800 is definitely not a problem for the film/dev combination.
Click on an image to view larger………