hugor, as per my previous posts in this thread, I would strongly advise you not to rely on the Kinesis height guide (especially on its own and ignoring the other measurements compared with what you usually ride).
In my case, I am 178cm, and the 57cm should fit me perfectly (Kinesis suggest a height range of 174cm-184cm for the 57cm, so I am in the middle of the range). Instead it is far too large, and the 54cm is a much better fit which closely approximates to the ETT of my normal road bikes, despite my supposedly being too tall for the 54cm (Kinesis suggest a range of 166cm to 176cm). Kinesis do advise to size down when you are uncertain about choosing between two sizes, but I still think they have got the suggested heights wrong.
In your case, I suspect the 60cm would likewise be far too big. Whether the 57cm or 55.5cm would be best for you will probably depend on your own riding style/normal position and preferences. So if you prefer the bars higher for a more upright (touring) position you might prefer the 57cm, whereas if you prefer to have a lot of drop from saddle to bars and prefer to replicate the more aero position you might have on a road race style bike, then you may prefer the 55.5cm. Although the 54cm has a 55cm ETT, I suspect it would be too small unless you are very flexible and have an extremely aero position. Obviously each size is adaptable by varying the height of headset spacers and length of stem, but I think you would find that the geometry would mean that using a long stem, e.g. 120mm, to compensate for too short an ETT would noticeably slow the steering (especially noticeably off road), and to some extent vice versa. One thing I did notice with the greater saddle to bars drop of the 54cm compared with the 57cm, is that it meant I had better weight distribution (more weight on the front, which improved the control/feel when riding off road on the hoods). Hope this helps.