RjjR454,
FWIW
I feel your pain for having to sell dad's guns. Your not the first or last to be put in that situation.
Those are days gone by. Whats most important is the days to come
. Glad your starting over as I'm sure you'll enjoy teaching your son well. Dads like you are what helps to insure our future 2nd Amend. rights.
As for a good SD 9MM round, I like Speer Gold Dot 124gr.
Also, todays 9mm ammo has come along way in the past 5-7yrs. Heck I still like the 127gr Hydro Shocks.
If you decide against the Sig., maybe a used 9mm in a Berreta f series.