CBR600 RR's are less comfy than CBRF4i's, the seat height isnt the issue as much as the padding and more aggresive riding position.Looking to get something that is a bit more comfortable. I heard that the newer CBR's are not too comfortable and that the person riding "b*tch" is sitting up a bit higher than the other bikes.
An Suzuki SV650 is something to seriously consider for a first bike, excellent low end power and nothing too crazy on the top end. More comfort than any of the other bikes listed.
Otherwise i'd go for the f4i