I just bought one with the newer rollmarks, for the purpose of turning it over to a gunsmith for some extensive work (I've owned a lot of 1911's, but this will be my first highly customized one).
It's a basic Combat Commander blue model, O4691 Colt model number. I paid $590 at a local store, where they had to order it and have the distributor verify they had the new rollmarks.
That said, prior to going to the smith, I've put 400 rounds through it for a bit of a break in. The 400 rounds included (in the order I shot them in):
30 Winchester white box 230gr - had two failures to feed (both with the same VERY old Shooting Star magazine - no Wilson's at that time)
50 S&B 230gr ball - no failures
20 Winchester 185gr Silvertip JHP - no failures
50 230gr Hydra Shok's - no failures at all
100 Reloads of Rainier 230gr ball w/3.9gr Clays
50 Reloads of Golden Sabre 230gr JHP - no problems
100 Reloads of Rainier 200gr JHP - I had two premature slide lock-backs on these, but they seemed a bit low powered at 4.0 gr Clays, and to be honest I was pretty tired by then and may have just limp-wristed
It's a great shooter and would serve me well as a stock pistol. My only complaints are that the trigger pull needs work (somewhat creepy and very heavy), and the slide is so sharp near the slide-release that it sliced my thumb up pretty badly.
Here are some pictures of it: