I was in a similar situation as you. I was torn amongst 1911s, polymers and a Beretta. I already have a concealed carry so capacity was not a big issue. 6+1 is still better than a 5 shot revolver since one can reload with a mag faster than from a speed strip.
I tinkered with the idea of the XDm 45, the 30 and the 1911. Reliability of 1911s shorter than 4" is questionable from what I read. First, rent different guns. See what's comfortable. You may find the 3" is not as fun to shoot. I like the polymers but there is something nice about a steel gun.
The used market is a better option for you. A lot of nice Springfields and Colts are circulating. I would stay away from 3" 1911s. Go for the 4" 1911 or get a Glock 36.