I have a pair of CF 4 that I believe is version 3, and what I like about them is they sound "cleaner, or more detailed than my 89 Forte 2, and my Heresy 2, and the Kg 5.2.
I have other brands I also rotate in occasionally, but they seem dull in comparison.
I was lucky to get a good deal on the 4's 5 years ago, and the only downside for me is the size and heft.
Hope this is helpful
NP - Elvis Costello - This Years Model