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With almost any manufacturer you can get a really good 1911, but the "cheaper" manufacturers will have a higher percentage of guns with problems in either the short run, the long run, or both. So, basically it is a crap shoot, but your odds are "better" with the top manufacturers because they have tighter tolerances on their guns and generally higher quality parts overall.
I would say they order is something like this (Only including manufacturers with most guns under $1500):
The best:
Dan Wesson
Tightest tolerances, highest quality parts, fantastic warranty should you have the rare bad one, no MIM parts, and each gun has specially matched parts (thus the tight tolerances) and assembly is done entirely by hand. The only issue is that they are so popular now that they may be working too hard to meet demand as it seems like quality MAY have slipped a little recently. Though it could just be that their rising popularity has resulted in many new people buying their guns and then not oiling them enough. People new to Dan Wessons may not realize you need to put a ridiculous amount of oil on them for the first ~500 rounds because of the ridiculously tight tolerances.
Close second:
STI (pricier though)
Damn fine 1911's:
Kimber
Springfield
Very good 1911's:
Colt
S&W
Sig
Para-ordnance
Decent 1911's:
RIA/Armscor
Basically, you would be fine for general purposes with any of these, even the RIA. For defensive carry you might want a weapon that holds more rounds than normal, which not all manufacturers offer (ruling out Dan Wesson). However, if you want a target gun then you want to go with the Dan Wesson, STI, Kimber, or Springfield, and hopefully you get one of the better ones for the Kimber or Springfield. Of course, you could just as well go with any of these, and even with an RIA you might get SUPER lucky and have a particularly accurate one, as mentioned previously.
Also, since Dan Wesson's don't cost more than most of these there is no reason to not get one of those as far as I can tell. If you bought a cheaper gun (other than an RIA) and had it fixed up by a good gunsmith it would still cost more than the Dan Wesson, though it might be a better gun at that point.