Purely based on my own experience...I have had / or still have 1911's from Wilson, Ed Brown, Les Baer and Kimber....some of my buddies have 1911's from Cabot, Nighthawk and Springfield... and I have fired them all from time to time.
Personally in terms of fit and finish ...I rank Wilson and Ed Brown #1 and #2 but they are very close... #3 in my view is Cabot ..and then there is a drop off in my view ..to Nighthawk...and another drop off to Les Baer...and then Springfield, Kimber, etc...
My one Les Baer a 5" Monolith model in 9mm..took at least 1,000 rds before it would run reliably. I had similar issues with a Kimber Gold Combat stainless II model in .45 acp.... / my buddies had break in issues with the Cabot and the NIghthawks ...and all of the Springfield, Kimbers, etc..
I had no break in issues with my Wilson's both 5" guns ( CQB in .45 acp or Protector in 9mm ) or Ed Brown 5" Kobra Carry in .45 acp.../ I ran them thru a break in period per mfg's recommendations - but they never failed.
In terms of reliability ...my personal experience is Wilson makes a very solid gun ....and while I have retired my CQB in .45 acp from carry ( because of my increasing arthritis ) -- I am now carrying the Protector 5" in 9mm and I train weekly with the Protector - its coming up on 11 yrs old in a few months and about 200,000 rds now..but its still as solid as the day it was new.
The CQB ..
http://thefiringline.com/forums/attachment.php?attachmentid=87077&d=1360863612
my Les Baer
http://thefiringline.com/forums/attachment.php?attachmentid=85774&d=1357338883 .. which was never reliable enough for me to consider it as a carry weapon. It was also a disappointment to me in terms of fit and finish.
Wilson Protector model in 9mm...
http://thefiringline.com/forums/attachment.php?attachmentid=81149&d=1336163670 my primary carry gun now.
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I'm a 1911 guy... in my late 60's now -- and I'm not ever getting away from carrying a 1911. The 2 Wilson's I have ....are 2 of the top 5 guns in my safe today...( and the other 3 in the top 5 that I own , would be a Sig X-Five L-1 model in .40 S&W, a S&W model 27-2 4" revolver, Nickel finish, .357 mag...and a Freedom Arms, 4 3/4" Octagonal barrel, model 83, 5 shot, large frame, single action revolver in .357 Mag...)...all 5 are very nice guns ...but the Wilson are certainly 2 of the top 5....
Ed Brown Kobra carry... probably in 6 - 10 .../ Kimbers maybe in 6 - 15 ...Sig 226's, lots of S&W revolvers in model 19's, 66's, 29's, 629's, 27's, 28's, 627's...are in there as well.
I would encourage to OP to try and find a Wilson Combat 5" gun...and if he wants a .45 acp...its hard to beat one of their basic models like the CQB in my view. There are about 20 CQB's right now on Wilson's website under "in stock" firearms that are between $3,500 and $3K right now - ready to ship tomorrow...as well as other models...
Good luck with your choice on the new gun !