Have owned the sig 238 and 938 which are very similar. I am a huge fan of the Stoner Bodyshield IWB holster (made by stoner holsters out of Ohio). I carry at 4:00. The body shield keeps the safety from digging into your skin if you aren't wearing a t-shirt.
I know what you mean about the grip safety but at least on the sig the safety is rock solid and crisp when engaged. Also, you can pull the slide back on it WHILE THE SAFETY IS ON to unchamber a round. Try that on a 1911!