It all depends on what you want to get out of it.
If you're just looking to plink with a "real 45" then a Charles Daly might do you just fine.
They are a nice low-end clone.
If you want it for defense, you'll be better off with a base model from any of the big co's, Colt, SA, Kimber, as you'll likely end up doing some work on it as you go, mostly b/c you can!
You should understand that the "true" 1911 A1 has a funky little hammer guard (it's a hand-guard in function) that can really pinch the web of your hand when firing strings, as your grip moves from less-than-ideal.
That's why almost all have a "beavertail" style on the grip safety, to give a broader surface for your hand.
Also, the ejection port (where the empties fly out) is a bit close-tolerance for many, and so again most guns you see will have the e.p. opened to give more clearance; this helps prevent malfunctions.
Same principle goes for the cocking serrations, sights, and I'm sure othere things that ended up just not quite selling in the sporting arms world, so most guns you'll see are not in fact "clones" but variants.
You can get a SA "1911 A1" that's pretty much the original (though I think the grip is a bit thicker in the front) which will give you an idea of what I'm talking about.
There's a bunch of funny stuff going on in the 1911-world right now, such as SA's new gun lock (key mechanism on the mainspring housing, backside of grip), Kimber's Schwartz-style firing pin block(Series II), Colt's old firing pin block system ("Series 80"), to name a few things.
These are all "solutions" to the discovered problem of having a free-floating firing pin, even in "safe" position, i.e., if you drop a loaded gun on its muzzle with enough force it may send the firing pin into the primer, igniting the round. The odds are pretty extreme, I'm sure, as I haven't heard of this happening ever (compared to how many who shoot someone while "cleaning" a gun?!?!) but you know this litigious society....
I have a compact-style from Kimber, basically like taking Colt's Officer frame and matching it to a Commander slide (one less round in the mag, one inch shorter barrel than the military version) in stainless steel, with a bull barrel (no bushing assembly), beavertail grip safety, lowered ejection port, medium-length trigger, modern sights and a full-length guide rod no less. You can't even field-strip it without a paper clip or some such thin wire! Though it is pre-Series II, this is pretty darn far from a 1911 A1 that your gramps used!
That said, I searched long and hard, and this is what I decided on for daily carry, found it as-new for $525, and after replacing a few small parts with steel (rather than nylon and "pot metal" as my folks called it) and a light trigger job, I wouldn't dream of letting it go. I can regularly keep many shots in a ragged hole at 15 yds, and I'm no sharpshooter.
Stoked with 8 rounds of 230gr and a spare mag, I feel right comfy.
Here's some stuff to look at.
http://www.sightm1911.com/http://www.m1911.org