If it's just the assembly you don't want to deal with, you can pick out parts and add an assembly fee with http://www.directron.com/.

I'd bought plenty of parts from them and the last time I needed a new PC, I had them do the assembly. I don't mind putting in drives and whatnot, but I don't want to mess with mounting the mobo or seating the processor.

Their website isn't always the most user-friendly, but once you get the hang of it, you can find everything you need.

For the record, no flash. You can check the EXIF data on the files if you feel the need. The area was a pitch black basement, no lighting. The clients brought their own spotlights for the shoot and that's the light in the photos.