Ray and JoJo wrote:
There are many lens, F 2.8, 1.8, 1.4 any of will do ISO >400 in low light, no flash and produce grate art
True, but at those f-stops you don't get a log of depth of field. Depending on what you want, you might need (want?) the flash. Either that of do as you need to with Auto ISO.
BTW, I'm not hung up on flash: I just shot a landscape at sunrise at ISO 1000.