Actually, if you are strict on the $400, I'd get the new 18-55 STM lens and the 40mm. That way you have the smooth and quiet autofocus of STM, a decent zoom range, and a 2.8 option. Maybe add a Rokinon/Samyang 14mm 2.8 as well. Most likely, you are not going to need the longer end of the 18-135mm, and I've read that the 18-55 STM has better image quality.