What's your purpose? Limited-10 in USPSA or IPSC?
Just look at what everyone else uses. I've got a CZ-85 that I've changed the trigger, sear, removed the firing pin block, etc. The trigger is just as good (if not a little better) than my Tanfoglio Gold. My Tanfoglio has a Hennings trigger and hammer upgrade, which is better than the stock trigger from the original firearm.
These triggers are just as light as most smiths are going to want to make a 1911 trigger. However, the best single-action only trigger on the CZ (and copies) is always going to be a (very slightly, to be sure) longer trigger pull than the best 1911 trigger. It's just the way the guns were designed.
So... why do I put up with it? I like the higher grip afforded by the slide being inside the frame. If you want that high grip, you are stuck with CZ or copies.
If you really, really want the best trigger that can be made, you really do need to start with a 1911 or 2011 (same trigger geometry).
So, what is my suggestion? Depends on what you want. If you want to try to actually be seriously competitive at Limited-10, you should probably go for a major power factor load: .40 S&W, 10mm or .45 ACP. There are double-stack 1911s out there, and there are 2011s out there that have a separate grip and frame. Pick your poison.
My choice was to go with a CZ and change the trigger. I like that gun just ever-so-slightly better than my Tanfoglio, but you might check that one out too. The CZ is a small frame, the Tanfoglio is a large frame. Your CZ will make a great base to upgrade from. I believe yours is DA/SA? If so, I'd ditch the DA and make it SA only before I switched guns, and I certainly wouldn't bother upgrading to the guns you mentioned unless you try them and just fall in love with one of them. You can also set your CZ up for 9mm Major and shoot in Unlimited, or I think you can convert it to .40 S&W as well. Maybe. You'll have to check on that.
Check out the Brian Enos forum for competitive tips. They are all about competition. THR is a better forum though