I've shot a lot of 3" and 4" 1911's in .45 acp ....and I didn't like any of them.... so I went back / or never left a 5" 1911...if you want to shoot a .45 acp round.... I equate the light and short 1911's in .45 acp ....like trying to hold a "Tomcat" ( a real cat - not a gun ) ....by the hind legs out in front of you ...and its hopping all over in a figure 8 pattern. Its ok for 2 or maybe 3 rounds ....but 4, 5,6, 7 the groups start to spread big time. I can shoot a
3" ...if I slow it down / and really concentrate...but its not easy to do.
and I would carry a 3", a 4" or a 5" in the same holster anyway .../ and at
6' 5" and 290 lbs will a few ounces make that big a difference ...and I shoot the 5" 1911 pretty well for an old guy ....
On the other hand ...if you want to carry a 9mm ...I think you have a lot of options from Springfield, Kimber, etc ...for under $ 1,500. Along that line, I have a Kimber tactical pro II model, 4" gun, in 9mm with alloy frame. I don't carry it hardly at all / but there is no reason I couldn't ... I've tested it with Federal Hydra Shok defensive ammo and it ran 100% with their 147gr hollow points....