When was the last time, if ever, any of you asked the guy in line behind you what he wanted? Looking out for #1 right. It would be a shame if your stock pile fell below 4000 rounds....
I have a sig 1911 for sale that is very accurate. I believe it had the most features of all the similar 1911 I looked at in that price range.
http://www.okshooters.com/showthread.php?160369-FS-Sig-Sauer-1911
If you don't know when it was changed last, I would start with that as it is your least expensive option. A good transition flush and change could go be a big help.
I have the all steel sp-01 and it's a heavy hunk of iron fully loaded. How do you like the polymer version in comparison to the steel version? I know it's about half the weight.