I can't comment, from experience, on the four-numeral SIG pistols, but really do like my P229s. I own five, and am "qualed" with four of them. I am grateful that the P229 is one of the approved choices as primary duty pistols for the PD which employs me, as it is probably the most perfect factory double-action .40 autopistol for my hands. I carry them on my own time, too, as they are easy to conceal. I get maximum value by using the same guns for personal CC and HD, as for duty.
There is a forum dedicated to SIGs, where I have learned much. I am not sure if it is kosher to post links; type sig forum (dot) com to get there.