Until I fell into a deal for a new TRP w/ Armory Kote for $1000 a few weeks ago, I too was looking at what 1911 to get for $1000.
I had narrowed it down to 3 -
MC Operator
SW1911 DK (the cheaper one - $899 here)
Sig Revolution w/o rail
It doesn't matter now, as I have spent my money, but I really wanted one w/ checkering or grooves on the front strap, and also a mag well. That eliminated the MC Operator.
I finally got to hold a SIg 2 weeks ago, and I was not impressed. I just commented on this gun on another post, so I'll just reference it here - it is post #5 - I wrote a detailed opinion of the Sig 1911 here:
http://forum.m1911.org/showthread.php?t=9552
That left the SW1911 DK - I think I would probably have bought this gun. Now, the only neg for me was the sights - they are all black - no dots. But I figured I would buy a Dawson fiber optic front sight, and that would have taken care of it. Nothing else to do to the gun...
So, just my opinion. Unless you just by a loaded springfield, which you can get for the $700 range, or just a tiny bit more for a Springfield TRP ($1100-$1200 range), then I would recommend the SW1911DK - I looked and read everything I could on all these guns for quite some time, trying to figure out what I wanted.