All of your specified choices are top of the line Sig models.....you won't go wrong with either choice, however....as mentioned above....I feel like the Sig P229 would be the best for all-around use. The 229 or 226 or both proven platforms....they both offer capacity and choice of holster....but, the P229 is much easier to carry. My P229 Legion 9mm has become my favorite Sig....Good luck with your decision!!

If the Sig 357 round was as inexpensive and prevalent as the 9mm and 45 I would go with it. Unfortunately it is not, so either 9mm or 45 would be good choices....I like them both.