I think many people go the clone route at the start. I know I did, and I still do occasionally. It is really a great way of seeing what you like, with the proviso that you might be put off by a bad one and miss out on the real thing. Howevr, these high end RTAs are not ...err...cheap. For those where clones dont exist, its an act of faith and review reading/watchind or making the most of the forums to get peoples experiences! Thats what makes it fun I guess!!
As for TC you are abso right. The KF4 is a prime example of something that can be made to work with TC but its really not designed for it. The GT2 also to a great extent. Inspired by my experience with the hotcig GT2 clone, I actually got hold of a Taifun GS2 authentic which is, without doubt, fantastic and actually works well with TC. I too have also found the 350J to be a little more sensitive than DNA40 devices. Dont have a DNA200 yet. Mighty jealous!!!
ps. for Taifun issues, you might want to check out posts by
@dwcraig1 who is the Taifun meister and I think he has been using his GT2's for TC!