Dan Wesson makes a fine, perhaps the best, production 1911. Tool steel parts with no MIM, good triggers, good quality.
The ECO does, however, have some reputation for teething problems with the tight springs to start with and need some time with quality, hotter, ammo to get a broken in. I also prefer such a small gun in 9mm as the .45 gets jumpy with such a light gun and if follow up shots are important to you, 9mm with run faster. The Colt Defender is also a pretty nice tiny 1911 for a little less, but I'd take the DW every day myself.
Another option to consider would be the Vigil CCO. Longer barrel and a bit heavier but better reliability and a longer sight radius with the short grip (good for concealment). If you carry IWB you likely won't notice much of a difference in concealability.