Lots of good options out there.
Here are some 1911s to keep in mind:
I bought this Kimber brand new for less than $1000 a few years ago. I had a lot of exterior work done on it, including a full dehorn, night sights were added and some replacement grips. We do some work on it here and there. It is a good starting point.
This Kimber is a very accurate shooter, and it has run right since day one. I think it looks pretty darn good too.
I got this Colt Series '70 used, and it had a lot done to it that I wanted already. Mag-well, cut for modern style Novak sights, a match grade bushing and trigger. I had some work done recently on this one too, and will post current pics soon. This is very accurate, and who ever had it before me broke it in, because it is as smooth as butter on glass.
Springfield Armory has many good offerings, but bear in mind, their mid range priced offerings are assembled in South America, not here. That may or may not be a big deal to you. I would be confident in the quality and craftsmanship, but still such a thing may or may not matter to you.
Sig Sauer makes damn good guns. Their 1911s are well thought of.
However, if you can save up a few more bucks, you may want to hold out for a Dan Wesson. They are worth the money.