Id have to agree about Kimber, series I is that way to go.
Colt, some say hit or miss. Id try to stick with the series 70 if you are going to go Colt. Buying a older Series 70 is always a great choice as it will run as it is now and is a GREAT platform to build off of and customize.
Baer is great if you want strictly a target gun, they are just a little too tight for carry.
You drop it down and get some crud in there then dont be surprised if the Baer does not run.
Rail... Nice, but not practical for CCW. You will have a VERY hard time finding a holster to carry it (most regular holsters will not fit a rail even without the light, some people don't realize that.) If it was strictly for range and home defense Id say get a rail as it would be nice to have a light on your bed gun BUT if you plan on it being a CCW piece its almost worthless. Save the rail till you get really addicted to the 1911 and then buy a full size with a rail for a bed/range gun.
You should really look at something with the Commander slide. 4.25 in a great set up for range or CCW use. You do not loose much by dropping off that .75 in and you gain quite a bit of comfort for carry by doing that.
Hope thats of some help.
Just get out there and play with a few things.
See what feel best, keep in mind all the good advice people have given here and weigh out your choices.
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AR15 EE Kimber CDP Compact Series I