AK,
Is your P239 a .40? I have a P229 in .40 and thought about adding a P239, for a more compact option. I was surprised at how heavy the .40 P239 was, and how thick the top of the slide is. Just ahead of the ejection port, it seemed like it was pretty thick. I don't know how the 9mm compares, though.
The standard grip was also uncomfortable - it seemed like it didn't have enough to hold. I also handled an SAS version of the P239. The grip on that one felt much better, but I didn't want a DAO trigger (DAK).
I still may revisit the P239 situation, maybe looking at the 9mm, if it is any lighter, but I would have to find better grips. The ones you have pictured look a lot better. What kind are they?
Thanks.