There are a lot of good choices from different brands. I happen to like STI. Not sure what your budget is, but STI makes several models on the officer size frame in 3" and 4". I carry the Guardian in 9mm, but it's also offered in .45 ACP as are the other models. STI offers some very nice hand fitted 1911s and as an added bonus they are U.S. made in Georgetown, TX.
“Once you have had a wonderful dog, a life without one, is a life diminished.” - Dean Koontz
STI Eagle (2), STI Trojan (2), STI Edge, STI Guardian, STI Sentinel, STI VIP, STI Ranger, STI Tactical 4.0, STI Rogue, STI Escort, 1943 Remington Rand 1911A1