Have you fired a Sig 239 yet? You need to make sure the gun fits your hand. The distance between the front of the trigger and the backstrap is shorter than in most other pistols. As a result, the grip feels "smaller" than it really is and the gun doesn't fit everyone. With me, the gun is too small and too much of my finger goes on the trigger. My finger naturally falls on the trigger a little past the first joint (away from my fingertip). This makes it harder for me to shoot the gun well. The Hogue grip helps some, but it's still a problem. The 225 and 228 fit me very well, by comparsion.
Try the 239 before you buy, if you can. The wood grips may actually help "bulk up" the grip a little. Other than that, it's a nice gun. Personally, I'd go with the SAS version. I don't like the transition between DA and SA on mine.