Boy, now, there's a subjective question if I've ever seen one!
I like your avatar...
OK, no really, in my very small sample of 1911s, the most reliable right out of the box was a Colt. The Springfield came in a close 2d, and the Kimbers a 3d.
But my sample is skewed:
Colt: New in Box
Kimber 1: New in Box
Kimber 2: 10 years old used
Springfield: New in Box
Kimber 1 was a 2d Generation with a flawed external extractor, so that caused a problem. Kimber 1 just had some worn-out parts I knew when I bought it and I fixed that. It's shooting 100% with my reloads and it's become my primary IDPA shooting gun.
Best bang for the buck was the Springfield, and honestly, I've only had a few FTF on it and that's with the MIM extractor still in it. I need to replace that with a Wilson bulletproof.
But if I come into some cash soon, I have my heart set on one of those new manufacture Series 70 Colts.
Now, that I've totally confused you, in my experience, this is what was most reliable, in order, out of the box for me:
Colt
Springfield
Kimber
If I were making my first 1911 purchase, this is the order I'd do it in:
Springfield
Colt
Kimber
And now that I've said, that, I'll also say, past performance is not meant as a guarantee of future performance. Your mileage may vary. Do not use this advice while driving a motor vehicle or operating heavy machinery.
Cheers,
kk7sm
ETA: I had very good experience with a Remington Rand I carried in the Army. That was one solid pistol.