Plenty of good suggestions here already. In that price range I would say look at lightly used stainless 1911's and let condition be your guide. With most of the features that you want the list could include the following in no particular order, but I would jump on the Colt first, if I saw one in good condition. Let condition be your guide.
SA Range Officer Stainless
Kimber Stainless II or Target
Ruger SR1911 Standard or Target
Colt S70 Govt Stainless
S&W E-Series (yes, external extractor but they run)
SA Range Officer Stainless
Kimber Stainless II or Target
Ruger SR1911 Standard or Target
Colt S70 Govt Stainless
S&W E-Series (yes, external extractor but they run)