Go with the Les Baer. It's features are what other 1911 type companies 'copy'.
The 945 is a good gun, and I've shot Smith's for more than 40 years. BUT...
That said I make my choices based on preference and a long association with 1911 type pistols.
(Talk to Clint Smith or some of the other guys who run quality Shooting schools, and listen to what they recommend,then invest in the Les Baer and a bunch of (Wilson) magizines.)