I have quite a bit of experience with both Colts and clones. The 7.5" SAA in 44-40 is my favorite handgun of all time.
One note: Cimarron, Taylors, EMF, Traditions, (and probably others) are American companies that import these guns and stamp their name on them. Some of them will do things like action slicking and some have unique specs, etc. but the only companies that make the guns are Pietta and Uberti, both in the Gardone gunmaking region of Italy. All these companies import both makes and stamp their names on them, so you make have to ask what you're getting if you go to these resellers. You can also buy straight from Pietta or Uberti on sites like Gunbroker.
For me, a 4 click action is a must. For that reason, I would not buy an Uberti. I do have one 4 click Uberti made before they went to the transfer bar system and it's great, so it's a shame they went away from the traditional Colt action. If I wanted something that was not 100% authentic, I would buy a Ruger. They are great guns and probably better than either Pietta or Uberti, so there's no need to buy a "clone" if it's not really a clone...Again, in my opinion.
That leaves Pietta. They still make only authentic 4 clickers, thank goodness. They are quite good as well. Most parts on a Pietta are mirror images of the Colt SAA itself. They are the most authentic of the Italian clones. I highly recommend them.
The only wildcard is making sure they hit to the sights. Many do but some don't (just like real SAAs)

. Parts are readily available and you can do pretty much everything yourself as these guns are simple, or if it's something difficult there are no shortages of people that work on them.
I've got a couple Piettas that I like so much that I sent them to Grashorn for stag grips. I shoot them more than my Colt's because obviously the replacement value is much less.
I'd also recommend black powder (at least sometime) for the full experience. That's why I like the 44/40 so much...it's a much better black powder round than the 45 Colt because it seals the chambers much better.
Good luck in your search and let us know how you make out!