One thing to be aware of: the stainless ones aren't as fast as the copper ones. Stainless doesn't conduct heat as well. I have the Stout offering, and it makes up for that in part by being somewhat longer--a standard copper one is, I think, maybe 25 feet. Mine, IIRC, is something like 31 feet long. Still, it's not all that terribly fast.
Now, if you're going from the CFC directly into the fermenter, you can control that by slowing down the speed of the wort to a point where it will chill it. But then it's a longer transfer. Nothing is free, apparently.
As you know, I'm doing LODO, as are you, so that's why I have it. Maybe other brands are better, I don't know. I do know this: whereas with my Jaded Hydra IC I could get a 5-gallon batch chilled to 70 degrees in 4-5 minutes, with the Stout CFC it's around 15 minutes, more or less.
I could speed that up a bit if I just directly transferred to the fermenter once the "OUT" temp of the wort dropped to 70, but part of what I'm trying to do is leave most of the cold break in the kettle, so i'm chilling the entire kettle down to 70.
All FYI. Good luck, fun stuff to experiment with.