Price wise, the 1.8g isn't far off a Sigma 35mm Art (about £400 used), which would be my preference by a country mile but I assume more than you want to spend?
Must admit, I've never liked the build and noise of the AFD lenses but not a lot wrong with the 35mm f/2 optically. If manual focus is an option you could take a look at the samyang 1.4 as well.