At about the $500 mark, the RIA guns are hard to beat for a nice, all steel shooter. Mine is accurate and reliable.
At around the $1000 mark, you are in the S&W, Kimber, Sig guns. Nicer than the RIA's, but not greatly so. Improvements above baseline guns come incrementally, not on a parallel track for dollar spent.
Personally, I like Kimbers, and think their Custom Target model w/ adj. sights is a good gun in the 1K range. Mine is the most accurate 1911 I have owned, out of a few. I hear a lot of good things about the Springfield Range Officer for a few buck less.
Two tone finishes, polished blue or stainless, fish scale serrations, etc. are nice, but not necessary, and add to the cost of a good, basic gun.
Larry