What about Aogami Super Custom Damascus from JCK?
I have a Blazen 270 gyuto f/ EE in SG2. It's more difficult to sharped than white #2 or AS, but I can get it very, very sharp with some concentration and effort. Looses that initial sharpness rather quickly, and settles to a point about 70-75% or so for a long time. Doesn't respond very well to a MAC ceramic rod or stropping compounds for touch-ups. I've not had any problems with this knife chipping.
I have a couple of Moritaka knives in AS - it's not much more difficult to sharpen than white #2, and has much better edge retention. I've had some chipping w/ AS. Depending on the maker, the angle being sharpened at, and the intended use, a micro-bevel may be appropriate.
I have a few knives if white #2 f/ Yusuke, claiming to be at 62HRC. Stupid easy to get stupid sharp. Not the greatest edge retention. Easy to touch up. The MAC rod gives it a rather toothy, rough edge that has a lot of bite. Responds readily to stropping compounds for touch ups. When it's no longer sharp and I don't have time to sharpen properly, I actually like to make a couple passes on the MAC rod to get the edge aligned and add some bite and then strop to smooth it out a bit. No where near as good as the edge off the stones, but passible.
Heiji's semi-stainless f/ Jon @ JKI is the best steel I've personally used. Easy to get sharp, and simply amazing edge retention. Heavy, thick knife though, yet still an amazing cutter.