'safe' iso setting?
I'm of the school that favors more shutter speed in dark conditions. There's no point in having a perfectly noise-free image... that is also perfectly unusable because the subject or your camera moved.
Personally, I'm ok leaving my auto ISO max high (3200 in my E-PL1's case). Noise can be addressed in post. Blur cannot.
|_F0A5334-Edit_small by Dester Wallaboo|
from Open Air Fashion Photography
|Feed me, me, me, me, me by Denjw|
from Attention-Seekers in Nature