ive got KLF 30 forte II and chorus I in my listening room. forte II has the better all round mid range. Though i feel the mid horn on the chorus I / forte I might image a little better when in the sweet spot. The KLF is good, especially in the bass, but in the mids they tend to be more shouty than either of the mid horns on the forte/chorus I's and II's.
i've never had the forte I setting in my room, but have heard it. It sound just about like the forte II. and really the chorus sounds about the same as well. The KLF sounds the most different, but even then pretty similar except for the peaky spots in the upper mids. Not really a big fan of the KLF mid horn because of it.
all of the comparisons are with Ti tweets.
if you can score forte ii or i for a good price, do it, throw in the Ti mid diaphragms and tweets, raise em up about a foot and enjoy a great sounding speaker.