The Pentax Kx's first paid assignment and it was the right job to break it in. As the client wanted candid photos in a convention room which was dimly lit.
The Pentax Kx is probably the king of the mountain right now for low light high ISO shooting for cropped sensors and the camera is only about $540 compared to either Nikon's or Canon's full frame cameras.
I managed to shoot some shots at ISO 6400 with very little noise. I was also breaking in my new lens. Not brand new. I picked up a used 28-80 FA 4-5.6 for pennies. The lens was very sharp and the range was perfect for the candid photos the client wanted me to take.